Natural selection is the mechanism in which an individual is naturally selected for adaptation or for the survival according to the resources availability that explains about the diversity of life.
It also explains that the new species come from pre-existing species and all the species shares a common ancestor that explains about the unity of life.
Darwin's theory on Natural Selection was proposed for the evolution. There are five basic steps, on which natural selection was base Variation, Inheritance, Selection, Time & adaptation
Without the knowledge of natural selection, it is impossible to understand the concept of unity and diversity of life on earth.
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Ways humans positive impact the nitrogen cycle
Humans positively impact the nitrogen cycle according to a recent study, humans are oversupplying ecosystems with nitrogen through the combustion of fossil fuels as well as an increase in industrial and agricultural activities that produce nitrogen. Although nitrogen is a necessary ingredient for life, it is a disaster for the ecosystem when present in large quantities.
The nitrogen cycle is the biogeochemical process through which nitrogen is changed into a variety of chemical forms as it moves across ecosystems in the atmosphere, on land, and in the sea. It is possible to convert nitrogen using both biological and physical methods.
The nitrogen cycle assists in introducing inert nitrogen from the air into plant and animal metabolic processes. The nitrogen cycle is crucial for plants because they need nitrogen to produce chlorophyll.
Because nitrogen is a necessary nutrient for supporting life on Earth, the nitrogen cycle is important. Amino acids, which are the building blocks of proteins, and nucleic acids, which are the building blocks of genetic material, both include a significant amount of nitrogen (RNA and DNA).
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What were the three key observations made by darwin that allowed him to deduce that natural selection is a primary driver of evolution?.
Organisms produce more offspring than survive, variation exists among members of populations, and advantageous variations increase in relative frequency over time.
Darwin located that unique types of animals had changes that made them higher ideal to their environments. Darwin's observations that caused his principle of herbal choice such as Overproduction in which all species will produce greater offspring than will live to tell the tale to adulthood. Variation ,there are versions among participants of the equal species. Adaptation that have tendencies that growth suitability to a species' surroundings might be handed on
One key statement Darwin made befell even as he became analyzing the specimens from the Galapagos Islands. He observed the finches at the island had been just like the finches from the mainland.
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Under a microscope, gram-positive bacteria (when dyed with the gram stain) appear _____.
Under a microscope, gram-positive bacteria (when dyed with the gram stain) appear in purple-colored structures due to the peptidoglycan cell wall.
What are gram-positive bacteria?Gram-positive bacteria are microorganisms (bacteria) that may be colored with crystal violet stain due to the presence of a peptidoglycan-based cell wall.
In conclusion, under a microscope, gram-positive bacteria (when dyed with the gram stain) appear purple-colored structures due to the peptidoglycan cell wall.
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Diabetic ketoacidosis (dka) in a client with type 1 diabetes occurs when the lack of insulin leads to the release of which physiologic product?
The answer to the above question is Fatty acids.
What are Fatty acids?A fatty acid is a carboxylic acid with an aliphatic chain that is either saturated or unsaturated. This definition applies to chemistry, particularly biochemistry. The majority of naturally occurring fatty acids have an unbranched chain with 4 to 28 carbon atoms, which is an even number. In some species, like microalgae, fatty acids make up a significant portion of the lipids (up to 70% by weight), but in other organisms, they are present as one of the three main types of esters: triglycerides, phospholipids, or cholesteryl esters rather than in their solo form. Fatty acids are crucial nutritional sources of energy for animals in any of these forms, as well as crucial cellular building blocks.
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The number of deltas found in an arch pattern is _____ the number of deltas found in a loop pattern.
In a fingerprint, the number of deltas found in an arch pattern is less than the number of deltas found in a loop pattern.
A fingerprint is a detailed pattern of friction ridges comprised of low points called valleys or depression and high points called ridges that can be found on our hands, feet and toes. The ridges and valleys combine to form a unique pattern on the fingertips called prints. Fingerprints can be classified into three patterns: loop, arch and whorl.
All fingerprints contain a core and a delta. The core is found in the approximate center of the print. The delta is the point where the ridges form a triangular shape, usually in front of the core.
A fingerprint with an arch pattern usually has no delta, while loop patterns have one delta. The whorl pattern has two deltas.
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Why does the stickleback fish system investigated by dolph schluter and colleagues represent a great example of ecological speciation?
Ecological speciation is the process through which new species develop as a result of differential natural selection between diverse ecological settings.
There are currently many instances of this technique. A type of speciation known as ecological speciation results from reproductive isolation when there is less or no gene flow between two populations of a species as a result of an ecological condition. Environmental changes that a species encounters, such as behavioral modifications in predation, predator avoidance, pollinator attraction, and feeding, as well as modifications in mate preference brought on by sexual selection or communication mechanisms, are examples of ecological factors.
New species are created as a result of ecologically motivated reproductive isolation under divergent natural selection. In the stickleback fish system, they adapt instead of being blind therefore it is an example of ecological speciation.
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Bacteria that have been identified as frequently responsible for nonsexually transmitted infections of the reproductive system include?
Escherichia coli, Gardnerella vaginalis, Staphylococcus aureus
Bacteria that have been identified as frequently responsible for nonsexually transmitted infections of the reproductive system include Escherichia coli, Gardnerella vaginalis, Staphylococcus aureus.
Can reproductive system infection be transmitted nonsexually?We usually observe that the infections of the reproductive system is sexually transmitted. But there are infections that are caused by microorganisms that can be caused non sexually. These are referred to as non sexually transmitted infections of the reproductive system. Which infections affect the reproductive system?In developing nations, gonorrhea, chlamydia, syphilis, bacterial vaginosis (BV), lymphogranuloma venereum (LGV), trichomoniasis, and chancroid are some of the more prevalent bacterial illnesses.What exactly constitutes a significant infection of the reproductive system?An infection of one or more of the higher reproductive organs, such as the uterus, fallopian tubes, and ovaries, is known as pelvic inflammatory disease (PID). Untreated PID can result in the formation of scar tissue and abscesses, which can harm the reproductive system permanently.Which conditions commonly affect the female reproductive system?ovarian tumors.diseases of the ovaries.Inflammatory disease of the pelvis.ovarian polycystic syndromepregnancy laborprimary ovarian insufficiency
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Explain in your own words how volume is measured.
Answer: Volume is measured by length x width x height.
Explanation: how that helps.
Registration refers to federal pre-marketing approval of biopesticides. what would not be regulated by u.s. environmental protection agency as a biopesticide?
DEET, a popular synthetic insect repellant.
DEET- Numerous repellent products include the active component DEET (N,N-diethyl-meta-toluamide). It is frequently used to ward off biting insects like ticks and mosquitoes. DEET can be applied to kids of any age, according to the FDA. Since results from studies conducted for product registration reveal no difference in effects between young animals and older animals, there is no restriction on the proportion of DEET in the product for use on children.
Insect Repellant- Products that discourage insects are known as insect repellents. These might be skin care products or items like candles or lanterns with heating mechanisms that release repellents.
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Bloodletting, a treatment devised centuries ago to restore the balance of humors, was accomplished with the use of?
Bloodletting, a treatment devised centuries ago to restore the balance of humors, was accomplished with the use of leeches.
What does bloodletting serve?Bloodletting was the term used to describe the removal of blood for medical reasons.It was believed to cure a number of illnesses and rid the body of filthy fluids.Blood was initially extracted by cutting an artery or vein, typically at the elbow or knee, to remove the diseased blood.Taking blood from a patient in order to cure or prevent disease is known as bloodletting.Bloodletting was founded on an outdated medical theory that saw blood and other bodily fluids as "humours" that needed to be kept in the proper balance to maintain health, whether it was performed by a doctor or a leech.To learn more about Bloodletting, refer to the following link:
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Which of these combinations would be found in a nucleotide? adenine-thymine-uracil base-acid-salt sugar-protein-fat dna-rna-nucleus base-sugar-phosphate
The combinations found in a nucleotide would be C. - "base-sugar-phosphate"
What is a nucleotide?
Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the key macromolecules found in all living forms on Earth, deoxyribonucleic acid (DNA), and ribonucleic acid (RNA), which are both nucleic acid polymers. In addition to being produced by the liver from common nutrients, nucleotides can also be received through diet.
The components of a nucleotide are a sugar molecule (either ribose in RNA or deoxyribose in DNA), a phosphate group, and a base that contains nitrogen. Adenine (A), cytosine (C), guanine (G), and thymine are the bases that are employed in DNA (T).
Question:
Which of these combinations would be found in a nucleotide?
(a) base-acid-salt
(b) adenine-thymine-uracil
(c) base-sugar-phosphate
(d) DNA-RNA-nucleus
(e) sugar-protein-fat
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_____ refers to any stimulus that interferes with accurately expressing or understanding a message.
Noise is any stimulus that interferes with accurately expressing or understanding a message.
One occupational health risk prevalent is noise in heavy manufacturing and industrial settings and other settings like bars, farms, and cafeterias. The primary health concern is permanent hearing loss. The main concerns in noisy office spaces and schools are interference with expressing or understanding a message, annoyance, and stress.
Noise levels should be limited to acceptable levels to avoid the adverse effects of noise exposure. The most efficient noise reduction strategy is engineering changes to the noise source or the workplace environment. When technology cannot sufficiently control the problem, personal hearing protection is an option. On the other hand, personal protection should be viewed as a stopgap measure while other methods of minimizing noise are investigated and implemented.
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The law of segregation would predict that the f2 progeny of f1 heterozygous plants will exhibit a ________.
The law of segregation would predict that the f2 progeny of f1 heterozygous plants will exhibit a 3:1 phenotypic ratio and a 1:2:1 genotypic ratio.
The Law of segregation was presented by Mendel to describe the characteristics of specific traits in organisms during gamete development.
According to this law, each gene has a particular allele that serves as a carrier of definite traits.
During the segregation process. the alleles separate and carry the dominant traits that will decide the characteristics of phenotypes of the next generation or offspring. This is also known as 'the law of inheritance.
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Neurotransmitters bind to __________, which are protein structures on the surface of the neuron cell membrane. a. neural receptors b. cell bodies c. impulse docks d. axon terminals please select the best answer from the choices provided a b c d
Neurotransmitters bind to option(a)i.e, neural receptors which are protein structures on the surface of the neuron cell membrane.
A neuron releases a signaling chemical called a neurotransmitter across a synaptic gap to influence another cell. Any major body component or target cell that receives the signal may be another neuron, but it could also be a gland or muscle cell. Throughout the body, a chemical messenger called a neurotransmitter carries, amplifies, and balances information between neurons (sometimes referred to as nerve cells) and target cells.
Neurotransmitters are crucial for maintaining brain function by enhancing and balancing signals in the brain. They support the regulation of physiological processes like respiration and heart rate, but they also serve psychological purposes including learning and the control of emotions like fear, pleasure, and happiness.
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Answer:
A. neural receptors
Explanation:
I got it right, hope this helps :)
The nucleus, mitochondria, endoplasmic reticulum, and golgi complex are examples of what type of organelles?.
The nucleus, mitochondria, endoplasmic reticulum, and golgi complex are examples of membraneous organelles.
This means that they are organelles which are found in the in any eukaryotic cell. Other organelles found in eukaryotic cells include ribosomes, centrosome, centrioles, chloroplast, lysosomes and others
Cytoplasmic organellesThe protoplasm of all living organisms are made up of both nucleus and cytoplasm. All the organelles which are embedded in nucleus of bitg plants and animal cells are known as cytoplasmic organelles.
Organelles found in the cytoplasm include the following:
Mitochondria: This is referred to as the power house of a cell. Ribosomes: It is the site of protein synthesis Golgi complex or golgi apparatus or golgi bodyEndoplasmic reticulumLysosomes and othersSo therefore, the nucleus, mitochondria, endoplasmic reticulum, and golgi complex are examples of membraneous organelles
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where does photo synthesis occur
Answer: In plants, photosynthesis takes place in chloroplasts.
Explanation:
Approximately+________%+of+the+stored+energy+of+an+organism+at+one+level+of+a+food+web+is+transferred+to+the+tissues+of+the+organism+that+consumes+it+at+the+next+level+of+the+food+web.
On an average only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next.
What is food web and its importance?A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is a part multiple food chains. The importance of food webs is to describe feeding relationship among species in a community.
A food web is a graphical representation of what-eats-what in an ecological community that is formed by the natural interconnection of food chains. The food web is also known as a consumer-resource system.
On an average only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next.
Approximately 10% of the stored energy of an organism at one level of a food web is transferred to the tissue of the organism that consumes it at the next level of the food web.
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An isotope is an atom with the same atomic number but different
Which organelle plays a role in intracellular digestion? lysosome chloroplast ribosome golgi apparatus plasmodesma
Lysosome organelle plays a role in intracellular digestion.
What is intracellular digestion?To function, all living things need energy. Cells must not only take molecules from their surroundings but also disassemble them in order to get energy from their external environment. Internal digestion is the term for this process.
Intracellular digestion refers to the process of food digestion that occurs directly inside the cells. Species with only one cell, such as amoebas, experience it.
When food is digested intracellularly, food components are broken down into smaller molecules inside of the cell's food vacuoles. When food is broken down into small molecules through extracellular digestion, it happens outside of the cell, either on decomposing organic matter or in the alimentary canal lumen.
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Which layer of the epidermis will be supplied with the highest levels of oxygen from the blood?
a. stratum granulosum
b. stratum basale
c. stratum corneum
d. stratum spinosum
Stratum basale supplies the highest levels of oxygen from the blood.
What are the layers of the epidermis?Four layers of the epidermis : stratum basale , stratum spinosum , stratum granulsum , stratum corneum . There exist a thin layer of translucent cells in thick epidermis called stratum lucidum. It represents a transition from SG and SC and is not usually seen in the epidermis.
Stratum basle is the deepest layer of the epidermis located between the stratum spinosum and dermis. This layer receives the highest nourishment from the blood which supports the activity of stem Cells.
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What did the microbiologist conclude? the hypothesis is supported because on average s. aureus was more susceptible to antibiotics than e. coli. the hypothesis is not supported because on average s. aureus was less susceptible to antibiotics than e. coli.
A microbiologist studies the microbes and the disease they cause. The bacterium that will be more responsive to antibiotic treatment will be Staphylococcus aureus.
What are antibiotics?Antibiotics are said to be the medication and drug class that works against bacterial infections. They are used to kill and slow the rate of growth or reproduction of microbes like bacteria to stop diseases or infections like flu, cold, cough, etc.
Antibiotic exposure can be used to evaluate whether the bacteria are susceptible or resistant to the drug. Staphylococcus aureus species are susceptible, thus the antibiotic therapy will prevent them from growing. Escherichia coli will grow because it is resistant, however.
Therefore, Staphylococcus aureus will become more responsive to antibiotics.
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Answer: A.
The hypothesis is supported because on average S. aureus was more susceptible to antibiotics than E. coli.
The laetoli footprints demonstrate that the foot of australopithecus afarensis was humanlike in having:_________
a. a divergent big toe.
b. elongated toes.
c. a flat foot.
d. a rounded heel.
Option(a)a divergent big toe is the correct answer.
The laetoli footprints demonstrate that the foot of australopithecus afarensis was humanlike in having a divergent big toe.
What makes Australopithecus afarensis unique?One of the most well-known and longest-living early human species is Australopithecus afarensis; more than 300 of its remains have been found by paleoanthropologists.What caused the extinction of Australopithecus afarensis?During glacial maximum, droughts may have become more severe, which may have contributed to the strong australopithecines' extinction. Although Australopithecus africanus may have survived until the time of the formation of Homo, which occurred at around 2.4 Ma, there is evidence that it did so up to about 2.3 Ma (Delson, 1988).Do Australopithecus still exist?An extinct species of australopithecine known as Australopithecus afarensis flourished in the Pliocene of East Africa between 3.9 and 2.9 million years ago (mya). The first fossils were found in the 1930s, but significant fossil discoveries weren't made until the 1970s.
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Drinking water treatment includes removal of all dissolved chemicals. true false
Answer:
true
Explanation:
because it cleans you inside
although penicillin inhibits peptidoglycan (cell wall) synthesis, bacterial cells will continue to grow normally in the presence of penicillin in a(n) environment.
Penicillin inhibits peptidoglycan by releasing beta- lactam that includes penicillin, monobactams and carbapenems these are arranged in lactam ring in molecular structure that inhibit the synthesis of peptidoglycan layer of cell wall of bacteria.
Bacteria that grow in presence of penicillin is gram negative bacteria because these bacteria have lipopolysaccharide and protein layer that surrounds the peptidoglycan layer and this layer prevent the attack of penicillin.
Lipopolysaccharide protect the cell from the entry of toxic molecules like antibiotics and bile salts.
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A mutation that ______ may confer a beneficial trait to a population of organisms, and eventually lead to evolution.
A mutation that increases survival and reproduction may confer a beneficial trait to a population of organisms, and eventually lead to evolution.
In the field of biology, a mutation can be described as a change that arises in the DNA of an organism.
There are numerous reasons for a mutation to occur such as errors during the DNA replication, environmental factors, viral factors etc.
A mutation is not always bad. Sometimes, a mutation can provide an organism with a better trait. A mutation that increases the survival rate or reproduction rate of an organism is considered to be beneficial. Such a mutation when passed on to offspring can lead to evolution over a course of time. In this way, a mutation can result in a beneficial evolutionary process.
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___can be separated by physical methods can only be separated by chemical methods and __ cannot be broken down further.
Mixtures can be separated by physical methods can only be separated by chemical methods and elements cannot be broken down further.
Physical methods can be used to separate mixtures, especially mixtures of solids. It is worth of note that physical methods can also be used to separate liquid mixtures. For instance, the fractional distillation of petrol is a physical process. Chemical procedures can separate compounds, but components cannot be broken down further. In other words, chemical methods/reactions can split a complex into simpler compounds. Chemical processes or physical mechanisms cannot break down elements into simpler compounds. Also, note that elements are further divided into electron, proton and neutron but this separation is neither by physical or chemical methods.
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What is the most prevalent form of an allele called?
a. neutral
b. normal
c. dominant
d. recessive
e. wild type
The most prevalent form of an allele called wild type.
So, the correct option is (e).
Natural allele refers to a type of gene that, when carried by an organism, has no effect on that organism's FITNESS to live and reproduce.An allele is one of two or more variations of a certain genomic location's DNA sequence. For each genomic region with such variation, an individual inherits two alleles, one from each parent. The person is homozygous for the allele if the two alleles are the same.A recessive allele is a form of genetic coding that, in the absence of a dominant allele, has no effect on phenotype.The wild type allele is the one that codes for the phenotype that predominates in a specific natural population.To learn more about allele.
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Which describes the smallest, most basic
structure of matter?
A. atom
B. element
C. compound
D. molecule
Answer: D molecule
Explanation:
You find a plant that has a unique photosynthetic pigment. the leaves of this plant appear to be reddish yellow. what wavelengths of vidible light are not being absorbed by this pigmnet?
The wavelengths of visible light that are not being absorbed by this photosynthetic pigment are from 300 to 700 nm except for 570 nm to 590 nm. and 620 nm to 750 nm.
What is Photosynthetic pigment?A photosynthetic pigment may be defined as a pigment that is present in chloroplasts or photosynthetic bacteria that captures the light energy necessary which is necessary for photosynthesis. These pigments are also known as accessory pigments.
Photosynthesis in plants is significantly dependent upon capturing light energy in the pigment chlorophyll and in particular chlorophyll a. This chlorophyll resides mostly in the chloroplasts and gives leaves their specific green color.
The yellow color absorbs the light of wavelengths 570 nm to 590 nm while the red color absorbs the light of wavelengths 620 nm to 750 nm.
Therefore, the wavelengths of visible light that are not being absorbed by this photosynthetic pigment are appropriately represented above.
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Select all the molecules that have stored potential energy and that can be used in aerobic respiration to generate atp.
a) lipids carbohydrates
b) water proteins
c) carbon dioxide
Carbohydrates, lipids, and protein have potential energy, and can be used in aerobic respiration to generate .
Carbohydrate- A carbohydrate is a naturally occurring substance or a derivative of one, made composed of molecules of carbon, hydrogen, and oxygen. The most prevalent organic compound is a carbohydrate, and all life depends on them.
Lipids- Fatty, waxy, or oily molecules are referred to as lipids. They are soluble in organic solvents but insoluble in polar solvents like water.
Protein- Large, intricate molecules known as proteins serve a variety of vital functions in the body. They are crucial for the construction, operation, and control of the body's tissues and organs and carry out the majority of their job inside cells.
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