The meristemoid cells in plants are similar to blastocyst cells in humans since they can not generate all types of tissues and is denoted as option A.
What is Blastocyst cell?This is usually in the form of a ball which is produced within days of the sperm fertilizing the egg which is usually before implantation in the uterus.
On the other hand, meristemoid cells are self renewing and undergo series of divisions in other to form a larger cell. Balstocyst only generates the three types of primary germ layers which include:
EctodermMesodermEndodermThe meristemoid and blastocyst cells can't generate all types of tissues which is why it was chosen.
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The options are;
a) blastocyst cells
b) totipotent cells
c) adult stem cells
Each individual cell in an excel worksheet area is identified by a letter and number combination, such as a2, known as the?
Cell reference or cell address refers to a combination of column specified by alphabets A-Z and rows specified by numbers that can be used to locate an exact cell in a spreadsheet.
This cell address makes operation on the worksheet easier eliminating the stress of manually locating cells whenever you are working. For example, in the summation of two numbers in different cells, the cell address for the two numbers can be entered in any desired cells with the operator symbol included. Hence, it’s common to see A1, B2, and C3, on the excel worksheet. In fact, the excel worksheet was built on the basis of cell referencing.
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Which widely-accepted set of ideas claims that all living things are made of very similar simple units with very similar characteristics?
All biological organisms are composed of extremely similar, basic units with very similar properties, according to the generally recognized cell theory.
What theory suggests all living things are made?
Theodor Schwann put forth the classical cell theory in 1839. This theory consists of three components. According to the first section, cells make up all organisms. Cells are the fundamental building blocks of life, according to the second portion.
Since the creation of the classical cell theory, technological advancements have made it possible to make more precise observations, which have resulted in fresh understandings of cells.
The modern cell theory was created as a result of these discoveries, and it has three main additions: first, that DNA is transferred between cells during cell division; second, that cells in all organisms belonging to the same species are largely similar in terms of their structural and chemical makeup; and third, that energy flow occurs within cells.
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Epithelial tissues always exhibit polarity; that is, they have a free surface and a basal surface. false true
Epithelial tissues have apical and basolateral surface which is separated by different cellular junctions.
What are epithelial tissues?Epithelial tissues forms the protective lining of various body surfaces. Various body cavities and several glands contain epithelial tissues.
Epithelial tissues are important because of their function of protection, secretion and absorption.
The general structure of epithelial tissues consists of a cell-membrane, nucleus and a cytoplasm.
Based on the number, epithelial tissues are classified as:
Simple epithelial cells - made up of single cell layer.Stratified epithelial cells- made up of multiple cell layers.Based on their shape, epithelial tissues are further classified into:
Simple squamous and stratified squamous epithelial cellsSimple columnar and stratified columnar epithelial cellsSimple cuboidal cellsCiliated columnar and pseudostratified columnar epithelial cellsTransitional epithelial cells.Therefore, epithelial tissues are important in protecting the internal and external body organs.
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If your ________ is destroyed, the left side of your brain could not control the movements of your right hand.
a. brainstem
b. hippocampus
c. amygdala
d. corpus callosum
If your brainstem is destroyed, the left side of your brain could not control the movements of your right hand.
Brainstem- The brainstem is the region at the base of the brain that is located between the cervical spinal cord and the deep cerebral hemispheres. It plays a crucial role in controlling some involuntary bodily functions like breathing and heartbeat.
Spinal cord- A column of nerve fibers that extends from the skull base to the middle of the back. It has three thin membrane-like layers of protecting tissue covering it. The vertebrae encircle the spinal cord and its surrounding membranes (back bones).
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A democracy can have both representative and direct characteristics at the same time.
Yes, democracy can have both representative and direct characteristics at the same time.
There are many both-elements democracies in the Middle and Western US states. On the one hand, they have legislatures made up of Representatives and Senators, which is obviously a representative democracy because the representatives are chosen by their constituents and serve as their representatives in the legislature. Many of these states also have the referendum and initiative processes. In places like South Dakota and Nebraska, voters can use the initiative process to collect signatures and put possible laws on the ballot; if the proposed law achieves a majority vote, it becomes a law and cannot be vetoed. This is a direct democracy since the voters are deciding whether legislation should be passed without using their representatives.
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When a non-enveloped animal virus adsorbs to the host cell with its protein spikes, the virions are taken into the cell by the process of:_______
When a non-enveloped animal virus adsorbs to the host cell with its protein spikes, the virions are taken into the cell by the process of endocytosis
What is endocytosis?Substances are introduced into the cell during endocytosis, a cellular process. A portion of the cell membrane that surrounds the substance to be internalised splits off to form a vesicle that holds the substance once it has been ingested. Phosphocytosis and pinocytosis are two examples of endocytosis.
By engulfing substances from the outside in a vesicle, cells can take them in through the process of endocytosis. Pathogens that immune cells engulf and eradicate can be one of these, as can nutrients that support the cell.
The movement of glucagon from the pancreas into the liver, where it is further processed for simpler absorption into the blood stream, is an example of exocytosis. delivery of protein-filled vesicles by T cells to virally infected cells.
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The proteins and cell components of halophiles have remarkably high intracellular levels of ________, which helps them survive in high salt conditions.
The proteins and cell components of halophiles have remarkably high intracellular levels of potassium, which helps them survive in high salt conditions. Proteins are big, complex molecules that perform numerous important functions in the body. Every protein is designed to perform a certain purpose. Any protein in the human body may be made with only 20 amino acid variations.
The seven categories of proteins are: contractile proteins, enzymes, hormone proteins, structural proteins, storage proteins, and transport proteins. They carry out the majority of the work in cells and are crucial for the structure, operation, and control of the body's tissues and organs.
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The _______________ provide(s) an interface to the services provided by an operating system communication shared memory simulators system calls.
The system calls provide(s) an interface to the services provided by an operating system communication shared memory simulators system calls.
A system call in computing refers to the way in which a computer program requests a service from its operating system kernel at the time it is required. It can therefore be defined as the interaction between the program and the operating system.
System calls perform system-level operations, such as communicating with hardware devices, reading and writing files, by accessing the kernel operating system, which runs in kernel space.
What is an operating system?An operating system is the group or set of computer programs that manage the internal resources (memory, disk, information storage) and external resources of the computer.
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List the importance of a binomial system of nomenclature.
Answer:
Binomial Nomenclature is important because it allows people from all over the world to communicate unambiguously about the various plant and animal species. Also, it makes sure that every scientific name is unique.
at high ph dna bases are in a keto tautomeric state resulting in decreased h-bonding stability and denaturation of dna strands
At high pH DNA is susceptible to alkaline denaturation that occur due to the abundance of hydroxide ions. It breaks the hydrogen bond and remove the hydrogen ion from the DNA base pairs.
Tautomeric state occur when the instant isomerization of nitrogen base occur to an alternative hydrogen bonding form that result into mutation. After this the mutation is corrected by by DNA polymerases ability.
This automerization occur when a proton transferred from one site to another site by steps in which the solvent is intermediary.
DNA polymerases is an enzyme which is responsible for forming new copies of DNA that is in the form of nucleic acid molecules.
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Which component of the membranous labyrinth is used to transmit auditory information?
The cochlea is the component of the membranous labyrinth used to transmit auditory information.
The cochlea is a hollow, spiral-shaped structure of the internal ear that plays a key role in hearing. The spiral structure of the cochlea enables it to detect various sound frequencies and helps in the transduction of the electrical impulse which is interpreted by the brain.
The sound vibrations are carried through a fluid known as endolymph. The hair cells in the organ of Corti, inside the cochlear duct, then transmit the mechanical vibrations into electrical impulses. The electrical nerve impulses are then carried by the vestibulocochlear nerve from the cochlea to the brain for interpretation.
Auditory vibrations are transmitted by the tympanic membrane and through the labyrinth, the fluid inside the cochlea. This fluid then activates the organ of the corti which then processes the vibrations to produce electrical impulses and then send them to the brain.
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A process for determining whether data from genetic crosses are consistent with a specific pattern of inheritance is called?
Data from the genetic crosses are consistent with the specific pattern of the inheritance is called as Punnett square
The Punnett square is the table in which the all of the possible outcomes for the genetic cross between the two individuals with the known genotypes are given. In its the simplest form, the Punnett square was consists of the square divided into the four quadrants. A Punnett square was a chart that is allows you to easily determine the expected the percentage of the different genotypes in the offspring of two parents. An example of the Punnett square for the pea plants is shown as below. In this example, both the parents are heterozygous for the flower color (Pp).
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In a human somatic cell (normal body cell) that is in g2, what would be true about chromosome number and structure? check all that apply.
Diploid- The terminology "diploid" describes an organism's cells having two full sets of chromosomes, with one chromosome from each parent present in each pair. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes.
Chromosome- A component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
Sister Chromatid- Sister chromatids are identical duplicate copies of one chromosome that are joined to one another.
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The small, almond-shaped organs of the female reproductive system, suspended by ligaments in the upper lateral portion of the pelvic cavity are known as?
The small, almond-shaped organs of the female reproductive system, suspended by ligaments in the upper lateral portion of the pelvic cavity are known as ovaries.
Ovaries are oval-shaped so are also termed almond-shaped organs and are present on the sides of the uterus in females. In females, the processes of pregnancy and ovulation which is also termed menstruation are controlled by the hormones that are made by ovaries. These hormones include estrogen and progesterone. Another major function of the ovary is that it releases the female gametes known as eggs during the menstrual cycle.
The ovaries are attached to two types of ligaments which are the ovarian ligament and suspensory ligament. Ovaries are connected to the womb by the ovarian ligament while the suspensory ligaments of the ovary contain the ovarian vessels and nerves.
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According to genome analysis, a member of the genus _________ is most closely related to the mitochondrion.
Rickettsia
According to genome analysis, a member of the genus Rickettsia is most closely related to the mitochondrion.
A category of illnesses known as rickettsioses are typically brought on by Rickettsia species, an obligate intracellular bacterial genus. Ticks carry the majority of the Rickettsioses, but fleas, lice, and mites can also carry them.What Rickettsia symptoms are present?Fever, headache, and rash are common symptoms of both parkeri rickettsiosis and RMSF, although the latter also frequently features the formation of an inoculation eschar at the site of tick attachment. Eschar is not frequently present in RMSF patients.How is rickettsia infection spread?The most common way that rickettsiae and rickettsia-like bacteria are transferred from animals to humans is through the bites of ticks, mites, fleas, or lice. Since they transport pathogenic germs from one host to another, ticks, mites, fleas, and lice are referred to as vectors.To learn more about rickettsia visit:
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Bladder wrack grows more quickly than saw wrack.
Suggest an explanation why.
Answer: The bladders hold lots of air.
The pyrimidine found in both dna and rna is __ ___. the pyrimidine found only in dna is __ ___ while the pyrimidine found only in rna is __ ___.
The pyrimidine found in both dna and rna is cytosine. The pyrimidine found only in dna is thymine while the pyrimidine found only in rna is uracil.
Cytosine is one of the four nucleotide bases in DNA. Within a double-stranded DNA molecule, cytosine bases on one strand pair with guanine bases on the opposite strand. The sequence of the four nucleotide bases encodes DNA's information
Thymine helps stabilize nucleic acid structures
Uracil help carry out the synthesis of many enzymes necessary for cell function through bonding with ribose and phosphates.
Adenine and guanine will be the two primary varieties of purine. These both happen in both DNA as well as RNA. Only one of the three primary pyrimidine types cytosine is present in both DNA as well as RNA. The other two were uracil, which only occurs in RNA, and thymine, which only occurs in DNA.
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If an atom has 14 protons, 11 neutrons, and 17 electrons, what is the atom's electrical charge?
Answer:
It would be=
14 protons -
17 electrons=
-3 :D
When you subtract protons from electrons, you get the electrical charge.
Explanation:
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The ____ of the spinal cord carries motor information from the brain to the muscles and glands
The correct answer is Descending tract of the spinal cord carries motor information from the brain to the muscles and glands.
One of the main pathways by which information travels between the body and the brain is the spinal cord. The brainstem continues caudally into the spinal cord.
Descending tract of the spinal cord.
Descending tracts provide motor information from the brain through the spinal cord to the body, such as commands to move the arm.
The primary characteristic of the musculoskeletal system that promotes locomotion is muscular contraction against a relatively fixed skeletal framework. But to move, muscle fibers need the action potentials produced by the spinal motor neurons of the anterior grey horn. Numerous upper motor neuron pathways that start above the level of tells control these lower motor neurons of the anterior grey horn in both conscious and unconscious ways (i.e. cerebral cortex, cerebellum, etc.). The actions of the upper motor neurons provide stimulatory and inhibitory modulation of the activity of the anterior horn cells, and by extension, the activity of the motor system.
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What is the purpose of a control group in a scientific experiment?
O to ensure that experimental results support the hypothesis
O to be a backup if something goes wrong with the experiment
O to serve as a basis of comparison with the experimental group
O to represent what happens when a variable is manipulated
Answer:
It is Between A & D. I think it's D.
A wildebeest can provide a total kf 2000,000 kcal. however, the total cost to hunt and kill a wildebeest is 50,000 kcal.!8( lions cannot spend more than 15,000 kcal per hunt, how many lions need to be in on the hunt
To hunt and kill a wildebeest, 4 lions need to be in on the hunt.
To measure the energy we use the unit kilo calories (kcal).
Given that the total energy cost to hunt and kill a wildebeest is 50,000 kcal and the maximum energy that can be spent by a lion is 15,000 kcal.
The number of lions needed to hunt and kill a wildebeest can be calculated by dividing 50,000 kcal by 15,000 kcal
Number of lions = 50,000/15,000
= 3.33 lions
As this value is not a whole number, the number of lions can either be 3 or 4.
As 3 lions will not be enough for the hunting, therefore 4 lions are needed.
Thus, to hunt and kill a wildebeest, 4 lions need to be in on the hunt.
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respira
photosynthesis are two of the major processes involved in cycling carbon
through the carbon cycle. Examine the model. How does cellular respiration cycle carbon
compounds through the biosphere? Choose the TWO choices that apply.
Sunlight
Carbon Cycle
CO₂ in the
atmosphere
Photosynthesis
by producers
Plant
respiration
Carbon fixation
by consumers
Animal
respiration
Decomposition
Fossils and fossil fuels
Fossil fuel
combustion
Cellular respiration absorbs carbon dioxide from the atmosphere.
Cellular respiration releases carbon dioxide into the atmosphere.
Cellular respiration uses carbon containing compounds to produce ATP.
Cellular respiration absorbs carbon containing compounds from the soil.
Cellular respiration releases carbon containing compounds into the soil.
In the _____ cell signaling mechanism, the chemical messenger acts upon the cell producing the signal.
In the autocrine cell signaling mechanism, the chemical messenger acts upon the cell producing the signal.
Autocrine signaling is the process in which the chemical messenger secreted by a cell binds to the receptor pf the same cell and therefore, some change occurs in the cell. The example of this signaling is the T-lymphocyte proliferation, upon entry of foreign pathogen t cell can stimulate its own proliferation.
Chemical messenger are the molecules that are function to carry some signal or message from one part of the body to another. The examples of chemical messengers are the hormones, ligands, neurotransmitters, etc.
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In meiosis, how does prophase i differ from prophase ii (choose all that apply)?
One diploid cell is present during prophase I, while two haploid cells are present during prophase II.
Describe haploid:Haplotype refers to a cell having just one pair of chromosomes. Haplotype is another word for the number of chromosomes present in sperm or egg cells, which are frequently referred to as gametes. Each of the 23 chromosomes in human haploid cells, which make up gametes, is one of a pair that is present in diploid cells.
What is an example of a haploid?Haplotype cells include, for example, gametes (male or female germ cells). Diploid cells include those found in blood, skin, and muscle.
How is haploid generated?When a parent cell divides twice, four haploid daughter cells with just half of the original genetic material are created instead of two diploid daughter cells with the entire set of genetic material on the first division.
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When the receptor cells have registered a _____, the energy is converted to an electrochemical impulse.
When the receptor cells have registered a Stimulus sensory organs the energy is converted to an electrochemical impulse.
What is meant by electrochemical impulse?They communicate among centers in the central nervous system and they command your muscles to move. Nerve impulse are electrochemical events. Observed as an electrical event , a nerve impulse is called action potential.
Without nerve conduction, the process by which nerve impulses travel along our neurons, none of our perceptions, thoughts, or memories would be possible. Nerve conduction is an electrochemical process, which means it involves the use of electricity generated by chemical molecules.
Stimulus sensory organs like ear, eyes, nose, skin and tongue are called sensory organs. Stimulus is visual, taste, touch, smell and hear.
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The ___________ is the thin layer of the mucosa responsible for pulling the mucosa into its many folds which increases the surface area of the alimentary canal.
Muscularis mucosa
The Muscularis mucosa is the thin layer of the mucosa responsible for pulling the mucosa into its many folds which increases the surface area of the alimentary canal.
The mucosa's outermost layer is called the muscularis mucosa. Elastic fibers and 3–10 smooth muscle cells make up its structure, which is often divided into an inner circular layer and an outer longitudinal layer. From the muscularis mucosa, smooth muscle cells may expand into the lamina propria and the villi.Where can you find the muscularis mucosa?The oesophagus and the large intestine, particularly in the terminal region of the rectum, have exceptionally well-developed muscularis mucosae. Additionally, the villi or spaces between the tubular glands of the stomach and large intestine contain isolated muscle cells descended from the muscularis mucosae.To learn more about muscularis mucosa visit:
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Explain the relationships among monomers, polymers, condensation reactions and hydrolysis reactions.
The relationship between monomer and polymer is that monomer is the unit by which polymer is made up of or the long chain of monomer is known as polymer.
What is monomer?A monomer is a type of molecule that can make chemical bond with any molecule and can form a long chain and polymer is a sequence of chain of an unspecified or unknown number of monomers.
Monomers are small sized molecules and they are organic in nature that can combined with similar molecule to form very large size of molecule, or the molecule is known as polymer. The main example of monomers are glucose, amino acids, ethylene, and vinyl chloride. Each monomer combined to form polymers in other ways.
Therefore, The relationship between monomer and polymer is that monomer is the unit by which polymer is made up of or the long chain of monomer is known as polymer.
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A compound in which polysaccharides are linked to peptide fragments that provides the main source of structural support to the bacterial cell wall is?
Peptidoglycan is a compound in which polysaccharides are linked to peptide fragments that provide the main sources of structural support to the bacterial cell wall.
Peptidoglycan is a stiff coat that surrounds the cytoplasmic membrane of most bacteria. It protects bacterial cells from environmental stress and maintains cell shape throughout their life cycle. Hence, it provides the main source of structural support to the bacterial cell wall.
By encasing the cytoplasmic membrane of most bacteria, peptidoglycan is responsible for osmotic stability. It is a one-of-a-kind, net-like polymer composed of glycan strands that are connected together by peculiar peptides. The structure of bacterial peptidoglycan varies greatly due to changes in amino acid sequence, cross-link types, and the presence or absence of secondary modifications in both the glycan strands and peptides.
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Phosphofructokinase is a glycolytic enzyme that is inhibited by amp .
a. true
b. false
Phosphofructokinase is a glycolytic enzyme that is inhibited by amp - False.
Phosphofructokinase is an enzyme that is involved in the process of glycolysis. It is used in phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate. It utilizes ATP for this step.
It is one of the key regulator of the overall reaction. Its activity is regulated by ATP. Whenever more substrate is formed and more amount of ATP is present it combines with the phosphofructokinase to inhibit its enzyme activity.
AMP has a reversing effect to this. When AMP binds with the phosphofructoskinase it boost the reaction in the forward direction.
Thus the activity of the enzymes depends on the ATP/AMP ratio in the cell.
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Explain how diffusion provides a steady supply of oxygen and eliminates carbon dioxide for a cell undergoing cellular respiration.
Answer:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.