In flowering plants, if the central cell of the female gametophyte is not fertilized, the structure that will not form is the endosperm. The endosperm is a triploid tissue that forms from the fusion of the two sperm nuclei with the central cell. It serves as a source of stored nutrients for the developing seedling.
What is an endosperm?The endosperm is a triploid (having three sets of chromosomes) tissue that forms from the fertilization of a flower in flowering plants. It is located inside the seed and serves as a source of stored nutrients for the developing seedling.
What is the function of endosperm?The endosperm provides the energy and nutrients needed for germination and growth of the young plant until it can establish its own photosynthetic capabilities and obtain nutrients from the soil. The endosperm is a nutritive tissue, containing starch, oils, and proteins.
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a student observes a cell through a light microscope and correctly decides that it is a plant cell. what observation would lead to that conclusion?
A. it has a large, central vacuole
B. ribosomes are visible
C. the nucleus is in the center of the cell
D. a cell membrane is present
A student makes the appropriate determination that a cell is a plant cell after looking at it under a light microscope. conclusion be reached from that observation. its center vacuole is large.
What exactly is a microscope used for?The tool of choice for enlarging minute objects is the microscope. Some microscopes can also be used to view an object there at cellular level, enabling researchers to see a cell's form and the locations of its mitochondria and other organelles.
What governs microscope, exactly?Understanding the fundamentals of microscopy—magnification, resolution, numerical aperture, lighting, and focusing—will help you operate the microscope effectively and with the least amount of frustration.
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5. why might a protein have two separate binding sites, and how might the binding of a small molecule to one binding site influence the other binding site?
A protein can have two separate binding sites for several reasons-
Regulation of activity, Facilitation of multi-step processes, Stabilization of protein structure.Regulation of activity: Having two separate binding sites allows for the regulation of protein activity through the binding of different molecules to each site. For example, one site might bind an activator molecule while the other binds an inhibitor, giving the cell a way to control the protein's activity.
Facilitation of multi-step processes: Some proteins have multiple binding sites to facilitate multi-step processes. For example, an enzyme may have two separate binding sites for different substrate molecules, which allows it to perform sequential reactions.
Stabilization of protein structure: Having two separate binding sites can also stabilize the protein structure and prevent it from denaturing. The binding of a small molecule to one binding site can influence the other binding site by changing the protein's shape or conformation. This can result in the opening or closing of the other binding site, making it more or less accessible to other molecules. The binding of a small molecule to one site can also affect the protein's activity or stability, which can have an indirect effect on the other binding site.
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what two physiological characteristics are highly developed in neurons?
Neurons have two main physiological characteristics that are highly developed: excitability and conductivity.
An electrically excitable cell known as a neuron, neurone, or nerve cell, synapses are specialised connections that frequently use little amounts of neurotransmitters to transport electric signals from the presynaptic neuron to the target cell over the synaptic gap. With the exception of sponges and placozoa, the neuron is the primary element of nervous tissue in all animals. Plants and fungus are examples of non-animals that lack nerve cells.
A normal neuron is made up of an axon, dendrites, and the cell body (soma). The axon and dendrites are filaments extending from the soma, which is a compact structure. Typically, dendrites branch out widely and reach a few hundred micrometres from the soma.
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besides springtails, are there other ways moss sperm may be transferred from male to female gametophytes?
Splashing of sperm from male to female gametophytes may be aided by rain. Sperm transfer from other species of animals may assist.
Mosses are tiny, non-vascular, flowerless plants that belong to the scientific order Bryophyta strictly speaking. The parent group bryophytes, which includes hornworts, mosses, and liverworts, may alternatively be referred to as bryophyta (sensu lato, Schimp. 1879. In wet or shaded areas, mosses frequently develop dense, green mats or clumps. The basic leaves on individual plants are typically only one cell thick, linked to a stem that may or may not have branches, and play a very limited role in transporting water and nutrients. Despite the fact that certain species have conducting tissues, these tissues are typically underdeveloped and physically distinct from tissue found in vascular plants. Mosses do not produce seeds; instead, they produce sporophytes, which are unbranched stalks topped with spore-containing capsules. Splashing of sperm from male to female gametophytes may be aided by rain. Sperm transfer from other species of animals may assist. Mosses can either be monoicous or dioicous (compare dioecious in seed plants) (compare monoecious). Male and female sex organs are carried on distinct gametophyte plants in dioicous mosses. Both are produced on the same plant in monoicous mosses, also known as autoicous mosses. A diploid sporophyte is created when sperm from the antheridia swim to the archegonia and fertilise it in the presence of water. Moss sperm are biflagellate, which means they have two flagella for locomotion. Fertilization cannot take place without water because the sperm must swim to the archegonium. Some species, notably Mnium hornum and many Polytrichum species, retain their antheridia in what are known as "splash cups," bowl-shaped structures on the shoot tips that cause the sperm to travel several decimeters when disturbed water droplets hit it, increasing the fertilization distance.
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which rib attaches to the sternum at the sternal angle?
The sternal angle, which denotes the point where the costal cartilages of the second rib articulate with the sternum, is a crucial clinical marker for locating numerous other anatomical locations.
Where does the sternum and the first rib connect?The topmost rib, or first rib, starts from thoracic vertebrae 1 and is the most bent and typically the shortest of all the ribs (T1). Just below the point where the collarbone and sternum converge, it articulates with the latter. It is attached by muscles to the anterior scalene and serratus anterior.
What part of the sternum does the second rib connect to?Sternal angle: The sternal angle is where the second rib connects to the sternum. The second rib is the visible rib because the first rib is concealed by the collarbone.
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a functional plant or animal, existing through the cooperative organization of interrelated systems, is called a(n) .
What is the name of the protein that travels in the phloem to shoot meristems and interacts with other proteins there to start the process of flower production? Multiple Choice:a. Flowering locus Timeb. Flowering locus Cc. CYCLOIDEA d. LEC1 protein
Option A is correct. Flowering locus Time- Genes that change flowering time in any Arabidopsis accession are referred to as "flowering-time genes" by us.
Endogenous genetic components, as well as a number of environmental elements like day length, temperature, and stress, influence when flowers appear. In the long-day-flowering plant Arabidopsis thaliana and the short-day-flowering rice, the genetic components and molecular mechanisms governing this process have been studied (Oryza sativa). Reviews of the research on those factors have, however, been scarce. In this study, we concentrated on the effects of nutrients, environmental temperature, drought, salinity, exogenously applied hormones and chemicals, and pathogenic microbes on flowering time. Plants either start flowering to produce seeds for the next generation in response to such stresses or stimuli, or else flowering is postponed by a slowing of metabolism.
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if you were a house, a contractor who expanded on the house by adding a new wing would be most similar to which type of bone cell?
The correct option is D; Osteoclast , The insertion of the muscle is the mobile end of the muscle that attaches to the bone being tugged, while the origin is the fixed (stabilized) end of the muscle.
The lumbrical muscles' principal function is to allow the fingers to straighten, but they can also assist bend the MCP joints at the knuckle. This muscle gets its name from the Greek word for earthworm.
The membranes of neighboring heart muscle fibers intertwine. The impulse can go directly from cell to cell through gap junctions. As a result, without separate innervation, heart muscle fibers perform rhythmic coordinate contractions.
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Full Question ; If you were a house, a contractor who hired two sub-contractors to help work on the house would be most like which type of bone cell?
Osteogenic
Osteoblast
Osteocycle
Osteococlast
a young man who ran 6 miles a day throughout high school is injured during his first season running cross country in college, and must rest for three months, then gradually begin exercising again. the skeletal muscle size in his lower limbs decreases during this prolonged period of inactivity. the organelles that break down his muscle protein are group of answer choices nuclei. peroxisomes. centrosomes. lysosomes. ribosomes.
A young man who ran 6 miles a day throughout high school is injured during his first season running cross country in college, and must rest for three months, then gradually begin exercising again. the skeletal muscle size in his lower limbs decreases during this prolonged period of inactivity. the organelles that break down his muscle protein are: lysosomes.
Lysosomes are membrane-bound organelles found in the cytoplasm of cells, containing hydrolytic enzymes which is able to break down and recycle cellular components that includes proteins.
During periods of inactivity and muscle disuse, the muscle cells in the lower limbs are not being used for a prolonged period, so the body initiates autophagy, where the lysosomes can break down the muscle protein. This results in a decrease in skeletal muscle size in the lower limbs.
Nuclei, peroxisomes, centrosomes, and ribosomes are all different types of cellular organelles with different functions, and doesn't take any role in the given scenario.
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which granulocyte is aggressively antibacterial, and has a band-shaped nucleus when young?
Answer: neutrophil is the answer.
which is the term for compounds that do not mix with water?
Hydrophobic is the term used for compounds that do not mix with water.
What is hydrophobic?To be hydrophobic is to be afraid of water. In chemistry, it refers to a substance's ability to repel water. A hydrophobic substance has hydrophobicity and is so called hydrophobic.
Hydrophobic compounds are nonpolar molecules that form micelles rather than being exposed to water. Nonpolar solvents are frequently used to dissolve hydrophobic compounds (e.g., organic solvents).
There are also superhydrophobic materials having contact angles of more than 150 degrees with water. These materials' surfaces are resistant to wetness. The Lotus effect refers to the structure of water droplets on superhydrophobic surfaces, which is inspired by the sight of water on a lotus petal.
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The ______ atrium and ventricle are prominent when viewing the heart from the posterior view. left.
Looking at the heart from behind, the left atrium and left ventricle are prominent.
The heart also rotates slightly around its vertical axis, so that much of the right side of the heart is visible in the anterior view and much of the left side is visible in the posterior view. The LA is located posteriorly and forms most of the base of the heart. In situ on the chest, the LA is posterior, left and slightly superior to the RA. The aortic root runs along the anterior aspect of the atrial septum. Looking at the heart from behind, the left atrium and left ventricle are prominent.
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what are the three basic components of a nucleotide?
A nucleotide is a element of DNA and RNA and is composed of three introductory factors a nitrogenous base, a five- carbon sugar, and a phosphate group.
The nitrogenous base is the most important element of the nucleotide and is responsible for the storehouse and transfer of inheritable information. The five- carbon sugar, generally ribose or deoxyribose, is the alternate element of the nucleotide and provides the backbone for the DNA or RNA beachfront.
The phosphate group is the third element and it binds the nitrogenous base and the sugar together. The phosphate group is also responsible for the transfer of energy within the nucleotide. Together, these three factors form the nucleotide, which is the abecedarian structure block of DNA and RNA.
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What does an apoenzyme require to become a holoenzyme?
Answer:
Apoenzyme needs binding with non proteinaceous small molecules called cofactors to become active. When apoenzyme binds with cofactor, the complex is known as holoenzyme. Holoenzyme is catalytically active to initiate the chemical reaction. The substrate binds with the holoenzyme, not with the apoenzyme.
Explanation:
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the following absorbance measurements are observed in a kinetic enzyme assay: time (minutes) absorbance 0 0.400 1 0.450 2 0.485 3 0.510 4 0.525 5 0.532 what is the best conclusion?
The best inference from a kinetic enzyme assay is that the reaction did not reach a steady state and that the sample must be diluted for a subsequent assay.
In the kinetic assay method, the progress of the response is steadily calculated as substrates are convinced into products. Changes in the concentration of two together substrates and products cause shifts in measurements.
Enzyme activity is repeatedly examined in the curative, biochemistry, and snack skill research fields to illuminate the rate at which the reaction occurs and the closeness of the something which incites activity-substrate interplays. The rates of these responses may be correctly calculated utilizing a UV-Visible spectrophotometer.
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The complete question is:
The following absorance measurments are observed in a kinetic enzyme assay:
Time (min.) Absorbance
0 0.400
1 0.450
2 0.485
3 0.510
4 0.525
5 0.532
What is the best conclusion?
what is the organelle that is tasked with cleaning cells of wastes and debris?
The organelle that is tasked with cleaning cells of wastes and debris is lysosome.
What are lysosomes ?
In eukaryotic cells, the lysosome is an organelle that houses enzymes that disintegrate waste products from cells and foreign invaders. Because it aids in maintaining cellular homeostasis by disassembling and recycling cellular components that are no longer required or have been damaged, it is frequently referred to as the "trash disposal" of the cell.
The highly specialized enzymes found in lysosomes are capable of dissolving a wide range of cellular waste, including lipids, proteins, nucleic acids, and carbohydrates. The lysosomal membrane, which is composed of lipids, serves to keep the digestive enzymes inside the organelle, where they cannot harm other portions of the cell.
In some diseases, such as lysosomal storage diseases, lysosomes can become dysfunctional and accumulate waste materials, leading to cellular damage and disease. Therefore, lysosomes play a crucial role in maintaining cellular health and function.
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What is a digestible straight chain type of starch that makes up about 20% of digestible starch found in plants multiple choice question?
A digestible straight chain type of starch that makes up about 20% of digestible starch found in plants is amylose, therefore the correct option is A.
Amylose is a type of polysaccharide which is composed of glucose motes and is occasionally appertained to as a direct polysaccharide. It's an important element of shops and helps to store energy. It's a complex carbohydrate that isn't fluently digested by enzymes in the mortal digestive system.
Amylose is set up in numerous foods similar as potatoes, sludge, sap, and whole grains. It's also set up in high- bounce vegetables similar as peas and lentils. Amylose is important for maintaining healthy blood sugar situations and for furnishing a slow, steady release of energy throughout the day.
Question is incomplete the complete question is :
What is a digestible straight chain type of starch that makes up about 20% of digestible starch found in plants multiple choice question?
a. amylose
b. polymylose
c. dmylose
d. none
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extensively discuss haemolysis
Hemolysis means the destruction or breakdown of red blood cells that results in the release of hemoglobin into the surrounding fluid, and there are many types of hemolysis, such as extrinsic hemolysis and intrinsic hemolysis.
What is the significance of the hemolysis?There are two kinds of hemolysis, such as extrinsic hemolysis, in which the RBC breaks down due to physical trauma, exposure to certain drugs or chemicals, etc., while in intrinsic hemolysis the RBC breaks down due to genetic mutations or other factors.
Hence, hemolysis means the destruction or breakdown of red blood cells that results in the release of hemoglobin into the surrounding fluid, and there are many types of hemolysis, such as extrinsic hemolysis and intrinsic hemolysis.
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dominant traits are usually... group of answer choices a. haplosufficient - where one copy is enough to obtain a normal phenotype.
In terms of mechanism, Dominant traits are usually haplosufficient, where one copy is enough to obtain a normal phenotype.
What is haplosufficient?Haplosufficiency occurs when a single copy of a functioning gene is sufficient to maintain normal function. Heterozygote carriers of recessive alleles typically have haplosufficiency, which is why they are unaffected even when their cells produce some defective proteins.
Haploinsufficiency occurs when one of the paternal gene copies is deleted or altered, leaving the other paternal copy of the gene incapable of making enough protein to perform a normal protein function.
However, it creates little or no gene product. Diseases caused by Haploinsufficiency are typically caused by gene mutations that encode proteins that are required in large quantities.
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in which cells or tissues is lactase produced and what is its role?
Explanation:
Lactase is produced in the brush border cells of the small intestine and its role is to break down the sugar lactose found in dairy products into glucose and galactose, which can then be absorbed into the bloodstream.
what advantages do solid media offer for the culture of microorganisms compared to liquid media?
Solid media provide a defined surface for the growth of colonies, making it easier to observe and quantify the growth of microorganisms.
This is particularly useful for the isolation and identification of pure cultures of microorganisms, as each colony can be assumed to have arisen from a single cell.
Solid media offer a stable environment for the growth of microorganisms. Unlike liquid media, which can become aerated or contaminated with other microorganisms, solid media remain relatively stable, allowing for more consistent results.
Solid media can be modified to include specific nutrients or environmental conditions that support the growth of particular microorganisms. For example, selective media can be used to inhibit the growth of certain microorganisms, while promoting the growth of others, making it easier to isolate and identify specific strains.
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why is atp necessary for active transport? why is atp necessary for active transport? atp is an important structural element of transport proteins. atp is in higher concentrations inside of the cell. atp provides energy to transfer material against its concentration gradient. atp is a constituent of the electrochemical gradient.
ATP gives material the energy to move against its gradient of concentration.
Because it supplies the energy required to transport molecules against one‘s concentration gradient, ATP is essential for active transport. Molecules are moved by active transport from a low to a high concentration. Similar to pushing a boulder uphill, this is energetically unfavourable and demands energy. Because it enables the cell to keep moving substances against by the concentration gradient, rather than from the region of low concentration to a area of high concentration of the surrounding environment, active transport is crucial for a cell's survival. Primary active transport, as well known as direct active transport, uses chemical energy directly to move all types of solutes against one‘s concentration gradient across a membrane.
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use the following map of four genes on a chromosome to answer the question. a map with four genes, labeled from left to right a, w, e, g. the distance between a and w is 5, the distance between w and e is 3, the distance between e and g is 12. between which two genes would you expect the highest frequency of recombination?
W and E are close and thus the frequency of recombination between two genes will be very high. This exchange of genetic material can lead the formation of offspring with new traits.
Homologous chromosomes align and exchange genetic material during meiosis. This process of exchanging genetic material is called recombination.
On a chromosome genes can be in various distance and this distance directly influence the frequency of recombination. When distance increases the frequency will be less.
Here we have given that the distance between W and E is 3 units, the distance between A and W is 5 units and distance between E and G is 12 units.
As we know W and E are close and thus the frequency of recombination between two genes will be very high. This exchange of genetic material can lead the formation of offspring with new traits.
Presence of genetic barriers and position of recombination sites within chromosome can be influenced by several factors which affects the actual frequency.
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which structure(s) is/are highlighted? a histological view of a pink area containing several large white gaps inside it, as well as many tiny purple dots. the highlighted structure is the entire pink area.which structure(s) is/are highlighted? periosteum trabeculae of spongy bone trabeculae of woven bone red bone marrow
The highlighted structures in the histological view are:
the periosteumtrabeculae of spongy bonetrabeculae of woven bonered bone marrowThe pink area is the entire tissue sample, and the white gaps and purple dots are features of the tissue sample.
The periosteum is a thin connective tissue layer that covers the outer surface of bones. It provides protection and serves to hold the bones together.
The trabeculae of spongy bone are thin, rod-like structures that form a network within the spongy bone, providing support and allowing for flexibility.
The trabeculae of woven bone are thicker and more irregularly shaped than the trabeculae of spongy bone, and they form a network that provides support and strength.
Red bone marrow is a type of soft tissue found in the medullary cavity of bones. It produces red and white blood cells, as well as platelets.
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A microorganism measures 5 μm in length. Its length in mm would be:
a) 0.05 mm.
b) 50 mm.
c) 500 mm.
d) 0.005 mm.
e) 0.5 mm.
0.005 mm. One millionth of the a metre, or micrometres, are frequently used to measure the size of microbes. Measureable traits of microorganisms include their genome sizes and growth rates, among many others.
Trillions of microorganisms, as well as "microbiomes," are present in the soil, plants, homes, the air we breathe, and on and inside of us. The large percentage of microbiomes support critical functions in our bodies and environments, including digestion and plant growth. In most cases, we can live side by side with them. With a greater understanding of these communities, we might be able using these complex microbial communities for implementations in agriculture and food safety, water purification, manufacturing, renewable energy, as well as biological threat detection.
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process in which soil bacteria convert nitrogen compounds in soil back into nitrogen gas which is released into the atmosphere
Answer:
Denitrification.
Explanation:
Denitrification is the process in which soil bacteria convert nitrogen compounds in soil back into nitrogen gas which is released into the atmosphere.
Hii! I need a good introduction paragraph in my debate paper about why we should NOT make another nuclear power plant. My key points are:
• Cost
• Waste Management
• Safety Concerns
• Nuclear Proliferation
35 points and marking brainliest answer for whoever can write me a strong introduction paragraph! :) thank you!!<3
The idea of constructing another nuclear power plant has been a topic of discussion for many years. However, there are several compelling reasons why this should not be pursued.
The reasons against a nuclear power plantThe cost of building and maintaining a nuclear power plant is extremely high, and the risks associated with waste management and the potential for accidents or nuclear proliferation pose significant safety concerns.
In addition, the potential dangers of radioactive waste and the difficulties of disposing of it safely make nuclear energy a less desirable option. Given these factors, it is clear that we should not be investing in another nuclear power plant.
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which of these microscopy methods has the highest magnifying capabilities?
A compound microscopy has the highest magnifying capabilities. Thus, option 1 is correct.
TEM or SEM, which has a higher resolution?Users of the TEM can magnify their samples more than 50 million times, although this is only possible with the SEM up to 1-2 million times. However, compared to TEMs, SEMs can reach a far broader maximum field of view (FOV), whereas TEM users can only image a very tiny portion of their material.
Why does TEM resolution differ from SEM?With TEM, you can see atomic-level features, providing new levels of structural information at the utmost resolution.
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Complete question:
Which of these microscopy methods has the highest magnifying capabilities?
compound microscopyoptical microscopelight microscopeUltramicroscopeYou should practice your orderly visual search pattern: A.) in the backyard B.) by selecting clues and events restricting your line of sight
C.) Once a Year
D.) as a passenger in a vehicle
As a passenger in a car, you should practice your systematic visual search pattern.
An organized visual search is a method used by people, especially in the industries of aviation and law enforcement, to quickly and effectively examine an area or scene for important details or objects.
In this method, the area to be searched is divided into portions, and each section is then methodically scanned in a precise order until the needed information is found.
It can be beneficial to practice an organized visual search pattern to increase one's capacity for rapid and accurate information recognition and processing in cluttered or complicated situations. It can also reduce the chance of error and prevent people from overlooking crucial information.
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i need help doing this pls help....
Answer:
Cc and Rr
Explanation: