1. research suggests that differences in DNA among species is not adaptive but rather both in...

1. research suggests that differences in DNA among species is not adaptive but rather both in DNA and morphology are.

a. Explain "adaptive" (evolution) (please include example)

b. Explain using examples if variations in adaptive and nonadaptive differ in usefulness in phylogenetic inference

c. Is it possible for traits that are non-adaptive to go through evolution (Eplain with a hypothetical example) (describe pressures and the situation)

Expert Solution

1. Adaptive evolution-It is produced by natural selection. It is the changes in the organisms in order to adapt to the changing environment. The changes could be morphological or genetical.

Example is the Humans living from years in the high altitude. they will have small hands and soles, in order to avoid heat loss, and will have high hemoglobin concentration, because of the low concentration of oxygen at high altitudes.

2.Adaptive radiatiion means organs with same origin and structure, which adapt to different environments.

Non adaptive radiation means organs which dont have the same origin and structure,but they evolve according to the need of the environment.

Examples-adaptive radiation- human hands, lion paws, fins of whale, theyall have same structure but hae different functions according to the need of the habitat.

Non adaptive radiation-Hands of gorillas and monkeys, although have different origins , which hs the same utility.

c.Non adaptive traits can go through evolution by a process called genetic drift.

example-population bottleneck, and the founder effect.

gladiator answered 2 years ago

Test the hypothesis that metabolic rate differs among spider species, while controlling for differences in size...

Test the hypothesis that metabolic rate differs among spider species, while controlling for differences in size (abdomen length). 1) State all relevant hypotheses (nulls and alternatives). 2) State which test was used and why you used it. 3) State conclusions after completing your analyses. Abdomen length metabolic rate Species 12 76 orb 18 70 orb 23 69 orb 31 63 orb 38 55 orb 42 55 orb 10 59 argiopes 15 51 argiopes 24 49 argiopes 28 47 argiopes 36...

Both keystone and foundation species are critical to ecosystem function. What are key differences between these...

Both keystone and foundation species are critical to ecosystem function. What are key differences between these two categories of species? Do some research on your own about different types of keystone and foundation species, and describe an example of each. What would happen if these species were eliminated? Discuss.

If two allometrically related traits show a strong correlation both within and among species, what kinds...

If two allometrically related traits show a strong correlation both within and among species, what kinds of experiments would you use to test whether these correlations are due to natural selection or to developmental genetic constraints? (Assume the organisms of interest are easily amenable to laboratory study.) What can we infer about the underlying genetic architecture of traits whose allometric relationships do not vary? What about those that do vary?

1. What in an antigen? 2. What are the main differences between innate and adaptive immunity?...

1. What in an antigen? 2. What are the main differences between innate and adaptive immunity? 3. What are the three lines of defense? State their function and give examples of each one. 4. What is humoral immunity? Which cells are involved in humoral immunity? 5. What is an antibody? Which cell produces it? 6. What is cell-mediated immunity?

1. Research one of the invasive species from the list below (or any other invasive species)....

1. Research one of the invasive species from the list below (or any other invasive species). Zebra mussel Cane toad Asian carp Kudzu wine Water hyacinth European starling European rabbit (invasive in Australia) Gypsy moth Lionfish Burmese python 2. Describe the species, upload a picture, and answer the following questions: where does it originate? where is it invasive? how did it become invasive? what damage does it cause? and how could it be controlled? Please cite sources

1) Short tandem repeats belong to the ______ class of DNA polymorphisms. 2) Rather than representing...

1) Short tandem repeats belong to the ______ class of DNA polymorphisms. 2) Rather than representing a biowarfare attack designed to infect US populations, explain the more likely intention of the anthrax letters of 2001. 3) Explain the benefit of engineering pathogen-resistant plants

1. Research on a conditioned eye-blink reflex in rabbits suggests that associative learning and storage...

1. Research on a conditioned eye-blink reflex in rabbits suggests that associative learning and storage of procedural implicit memories might occur in the__________ : a. intermediate nucleus plexus of the amygdala. b. dorsal nautaloid nucleus of the anterior pituitary. c. lateral positus nucleus of the cerebellum. d. lateral genicuulate nucleus of the corpus callosum. 5. Typically, the brain of a healthy, alert older person features __________ in comparison to the brain of a middle‑aged person: a. more neurons...

GASB suggests that there are 4 major differences between governments and businesses: 1. Organizational Purpose 2....

GASB suggests that there are 4 major differences between governments and businesses: 1. Organizational Purpose 2. Revenue Process and Sources 3. Longevity 4. Relationship with Stakeholders 5. Importance of Budget Explain the difference between governments and for-profit businesses in each of these 5 areas.

Does Central Banker’s often worry about 1) citizens have adaptive expectations rather than rational expectations 2)...

Does Central Banker’s often worry about 1) citizens have adaptive expectations rather than rational expectations 2) Cyclical budget deficits reducing the contraction in output due to a recessionary shock 3) increasing anticipated growing inflation for future 4) Prime Minister's pressure to reduce interest rate 5) none of the above?

1. Why does E. coli need both DNA polymerase III and DNA polymerase I? a. The...

1. Why does E. coli need both DNA polymerase III and DNA polymerase I? a. The DNA replication is bidirectional; one polymerase is used for each direction. b. Each polymerase is specific for only one strand of DNA. DNA polymerase III acts only on the leading strand, and DNA polymerase I acts only on the lagging strand. c. Only DNA polymerase I has proofreading ability. d. DNA polymerase III lacks the 5' → 3' exonuclease activity needed to remove RNA...

Question