Answer:
Homologies and vestigial structures are two evidences of the evolution of how DNA and comparative anatomy used to show relatedness
Explanation:
Living organisms have characteristics that make them similar to others, which may suggest that at some point in the history of life on Earth, they shared a common ancestor. When we look at the limbs of a crocodile and a rat, for example, we find that, despite their differences in morphology, they are quite similar in anatomy, suggesting that they may be related. In this case, we say that the characteristic is homologous, that is, it has a similar embryonic origin, but it does not always perform the same function.
Trace structures are structures that are atrophied and have no apparent function in an organism. The presence of these organs can be interpreted as evidence of evolution, since the structure, today without much apparent function, may in the past have been extremely important to the ancestors of that species.
Evidence for evolution are Fossil Record, Homologous Structures, DNA and Molecular Evidence. DNA and Comparative Anatomy to Show Relatedness as DNA Sequencing, Molecular Clock.
1. Fossil Record: The fossil record provides evidence of how species have changed over time. Fossils of extinct organisms help to establish transitional forms, showing the gradual changes and relatedness between different species.
2. Homologous Structures: Homologous structures are anatomical features in different species that share a common ancestry but may have different functions. These similarities suggest a common evolutionary origin. Comparative anatomy studies these structures and their patterns of variation across species.
3. DNA and Molecular Evidence: DNA and molecular analysis have revolutionized our understanding of evolution. By comparing the DNA sequences of different species, scientists can determine their degree of relatedness. Similarities in DNA sequences provide evidence of common ancestry and evolutionary relationships.
2) DNA and Comparative Anatomy to Show Relatedness:
1. DNA Sequencing: DNA sequencing allows scientists to compare the genetic material of different species. The more similar the DNA sequences are between two species, the more closely related they are thought to be. For example, humans and chimpanzees have a high degree of DNA sequence similarity, indicating a close evolutionary relationship.
2. Molecular Clock: Molecular clock analysis uses DNA mutations to estimate the time when two species diverged from a common ancestor. By comparing the number of genetic differences between species and the mutation rate, scientists can approximate the time of divergence and infer relatedness.
3. Homologous Genes: Just as there are homologous structures, there are also homologous genes. These are genes that are shared between different species because they were inherited from a common ancestor. The study of homologous genes provides strong evidence of shared evolutionary history.
4. Comparative Anatomy: Comparative anatomy examines the similarities and differences in the anatomical structures of different species. Homologous structures, such as the bones in the limbs of vertebrates, reveal common ancestry and relatedness.
5. Embryonic Development: Comparing the embryonic development of different species can reveal similarities in early stages, providing evidence of shared ancestry. For instance, the early embryos of fish, reptiles, birds, and mammals share common features, suggesting a common evolutionary origin.
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a certain tapeworm secretes a chemical that slows the intestinal pulsation of its host. this helps to ensure that the tapeworm isnt expelled from the body of the host. explain how adding this chemical to a drug for humans might increase the drugs effectiveness
"the pathway followed by glucose 6 phosphate when the cell needs to divide is called"
Your blood pressure is 135/85, what does this mean in terms of the amount of pressure in the systemic arteries and in terms of what the heart must generate to eject
High blood pressure
Compare and contrast Broca’s area and Wernicke’s area. Describe how each was discovered.
Answer:
Broca’s area is the area of the brain that controls speech production. It was discovered by Paul Broca after he discovered a lesion in the left frontal lobe of a patient who could not speak. Wernicke’s area is the area of the brain that controls speech comprehension. Like Broca’s area, it also plays a role in speech production. Wernicke’s area was discovered by Carl Wernicke, who found that damage to the left temporal lobe resulted in speech deficits.
In which infertility treatment are eggs fertilized in a clinic and then transferred to the woman's uterus?
An isotope has the same ________, but a different ________
Answers
A) atomic number, mass number
B) Mass number, atomic number
C) number of neutrons, number of protons
D) number of protons, number of electrons
Answer:
Atomic number, mass number.
Explanation:
The three sub atomic particles of the atoms are electron, proton and neutron. The atomic number of the element is equal to the number of protons of the element.
Isotopes may be defined as the elements that have the same atomic but different mass number. The simplest example of isotopes are protium, deuterium and tritium. They have the same atomic number 1. These are the isotopes of hydrogen.
Thus, the correct answer is option (A).
True or false: the quantity represented by ω0 is a function of time (i.e., is not constant).
The diversity found among dna molecules is due to the sequence of _______.
Final answer:
The diversity among DNA molecules comes from the sequence of nucleotides, which can create a vast number of combinations despite having only four types. Mutations contribute to this diversity by altering DNA sequences, leading to variations among individuals.
Explanation:
The diversity found among DNA molecules is due to the sequence of nucleotides. Even though DNA consists of only four different bases — adenine (A), cytosine (C), guanine (G), and thymine (T) — the arrangement of these nucleotides can vary infinitely. Each organism has a unique DNA sequence, which serves as a genetic blueprint vital for its development, functioning, and reproduction. This genetic diversity is the foundation of the wide variety of life on Earth.
Mutations are changes in the nucleotide sequence that can occur spontaneously or due to external factors like radiation or chemicals. These mutations can lead to variations among individuals within the same species, contributing to the biological diversity we observe. Such variations include single nucleotide polymorphisms (SNPs), which are differences in single nucleotides between individuals, further highlighting the role of nucleotide sequences in genetic diversity.
One function of the plant cuticle is to increase water uptake by roots true or false
. Many cities have “combined” sewers. In good weather, these systems funnel sewage to treatment plants. During rainstorms street runoff is combined with sewage. Combined sewers in cities can be problematic because _____. the sewers cannot handle the volume of waste from street runoff and sewage sewers are often blocked by trash that people have thrown into them street runoff cannot flow into the sewers and be safely taken to treatment plants street runoff often causes the sewers to deteriorate
The given blank can be filled with the sewers cannot handle the volume of waste from street runoff and sewage.
The combined sewage system is very popular in many big cities. The sewage system handles all the sewage combining from the houses. During the rainy season, the water flows in the sewer, causing the overflow of the sewers and spread of water in the nearby regions.
What best explains why the moon's surface gravity is only one-sixth of Earth's surface gravity?
Answer: The answer is D
Explanation: The moon is smaller than the earth therefore the gravity is less
what is a characteristic of scavengers that make them different from carnivores PLEASE HELP.
How would you classify l.l.bean in terms of competitive position why?
The L.L. Bean can be classified as catalogue retailer, for it has an extensive product selection and design indicating the preferences of their customers. It provides customer satisfaction by delivering high quality products, fair pricing, convenience and service in no time.
Moreover, they deliver product from their warehouse to the customer with minimum mistake and fair price to remain in competition for they want to create competitive advantage over the competitor by branding own products and persuasive advertising and give maximum benefits to its customer.
What are the limitations to using electrophoresis to verify purity of a protein product?
Chromosome iv in drosophila is a very small chromosome and carries a tiny amount of genetic material. fruit flies that are trisomic for chromosome iv have no apparent phenotypic abnormalities, and they retain their fertility. among the genes on chromosome iv is one for which a recessive allele ey produces the "eyeless" phenotype. a male that is trisomic for chromosome iv and has the genotype + + ey is crossed to a diploid eyeless female with the genotype eyey.
Why do you think there are fewer heart transplants performed each year than kidney transplants?
This is because, people, generally, have two kidneys and are also able to function properly with one functional kidney. Therefore it is easier to perform kidney surgery without putting the patient’s life at risk as compared to heart surgery. Everyone has one heart, a critical organ whose surgery has to be well planned and done only if the risk of not doing the surgery outweighs that of doing the surgery.
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. (blank)are healthy fats that have at least one double bond in the fatty acid chain. Most (blank) are artificially hydrogenated fats that have detrimental effects on health.
-saturated fat
-unsaturated fat
-trans fat
describe how waves superpose on each other using specific examples from two types of waves
During superposition of a wave such as that of the oceans, when the crest and the trough meet, then they cancel out into the period. If two crests meet up, they add up to a crest that’s equivalent to the summation of their amplitudes. This is also true when two troughs meet up.
Many yogurt containers have a seal that says contain live cultures. This means that there are live bacteria in the yogurt which can function as probiotics. Which sentence BEST describes the purpose of these probiotic bacteria?
A-the bacteria are beneficial because they give the yogurt it’s fruit flavors
B-the bacteria are beneficial because they provide an additional source of protein in the yogurt.
C-the bacteria are beneficial because they act as a preservative to extend the shelf life of the yogurt
D-the bacteria are beneficial because they can improve the balance of good bacteria in a persons intestines.
Which of the following terms describes the study of genes during the 1900s?
Alvira is being treated for borderline personality disorder in an inpatient treatment center. what will the second stage of treatment generally involve
Borderline personality disorder refers to a kind of mental illness, which is signified by an ongoing pattern of differing moods, behavior, and self-image. In the second stage of borderline personality disorder, the patients are been permitted to demonstrate their physical emotions that the patient is avoiding for some time.
The objective of this stage is that the patient fully expresses his or her emotions. The correct answer is option C that is, discussing the loss of her parents at the age of five and how this is associated with Alvira's current emotional issues.
Thermohaline circulation is movement of seawater due to differences in what two properties?
1)
density and temperature
2)
salinity and temperature
3)
temperature and depth
4)
salinity and density
Answer is 2. Salinity and temperature.
The movement of water in the ocean is called thermohaline circulation. This circulation is depends on temperature and salinity. These two factors together affect the density of seawater. More dense seawater sinks below less dense seawater and thus the oceans circulate partially based upon their temperature and salinity. Heat from the Sun affects temperature of seawater. Surface seawater gets more heat near the equator than near the poles, and similarly more in the summer than in the winter. Salinity of seawater is affected by evaporation, precipitation, ice formation, and ice melting. Evaporation increases the salinity of seawater because when seawater evaporates, the salts are left behind, thus increasing their concentration. Precipitation and river input decrease salinity because the input of freshwater dilutes the salts in seawater, thus decreasing their concentration.
A 21-year-old presents with inflammation of the testes and is diagnosed with orchitis. what is the most likely cause of his symptoms?
Reflect on all the illnesses anna garcia has experienced.did any of her illnesses studied this year result in a breakdown of her body's ability to protect itself?
Anna Garcia had experience various illnesses that weaken her immune system and make her body more susceptible to bacterial infection. Her sickle cell disease results in low amounts of oxygen in the body where the white blood cells cannot function and protect the immune system.
Moreover, her type I diabetes results in fatigue and exhaustion because the body cannot convert glucose to energy. Lastly, she had urinary tract infection for her body does not have strong immune system against the pathogens causing the problem.
An animal emits a response in the presence of a certain tone. if a slightly higher pitched tone elicits the same response, then stimulus _______ has taken place
ions are necessary to activate the binding sites on the actin filaments.
Answer:
Complete the following statements.
Calcium ions are necessary to activate the binding sites on the actin filaments.
The molecule ATP is required each time the myosin head detaches from one site and reattaches to another.
Explanation:
just got it from edge
bacteria can reproduce quickly by means of binary fission. because of this, after binary fission..
Out of the following given choices;
A)the offspring will have traits of both parents.
B)there is genetic variation among the offspring.
C)all the offspring will be genetically identical.
D)none of the offspring will be genetically like the parents.
The answer is C. This is because, in binary fusion, they are no formation of gametes. Therefore genetic variability that comes with sexual reproduction not found in asexual reproduction. Mostly, the offspring buds off from the parent or grows from a split part of the parent. Therefore the offspring is genetically identical to the parent
Genetic material that directs the cell is called (2 points) RNA the nucleus cytoplasm DNA
What is a wind farm? A. a farm that uses wind to pump water for irrigation B. a place where wind energy is harvested C. a place where wind is produced D. a farm that uses wind to power equipment
Answer:
B. a place where wind energy is harvested
Explanation:
In eukaryotic nerve cells, k+ concentrations at rest are __________. in eukaryotic nerve cells, k+ concentrations at rest are __________. higher inside the cell than outside the cell higher outside the cell than inside the cell equivalently high both inside and outside the cell equivalently low both inside and outside the cell