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1. The common ancestor of all the tetrapod vertebrates had four limbs with a similar skeletal structure to thatseen in many vertebrates today. Considering this, in what sense are the arms of humans homologous to thewings of a bird?
2. The green algal ancestors of plants existed in aquatic habitats, contained chlorophyll a and b, and had cellwalls composed mainly of cellulose. Land plants also contain chlorophyll a and b and have cell walls ofcellulose. What traits in the land plants are primitive? What trait represents divergent evolution from theancestral form?
3. The ancestors of hominids were quadrupeds, walking on four legs. Humans are bipedal. Is this characterderived or ancestral? Are the walking habits of chimpanzees primitive or advanced?
In the mythical beast Nechnüm nreyab, horn length is an example of continuous variation, under the control of five genes: A, B, C, D, and E. How many different genotypes encode 20-cm horns? List them all
Using one of these ecosystems,(indigenous forest, grassland, desert, fresh water pond, etc.) Draw a diagram of a food chain, using at least four organisms at different levels.
Describe the expression of a gene as it occurs in a eukaryotic cell, starting with the gene and ending in a vesicle. What takes place in each subcellular organelle? Briefly discuss how this differs from a prokaryotic cell.
Compare and contrast holoplanktonic and meroplanktonicorganism
Give illustrate account about subaerial modification of stem?
Give two examples of a poor warning. Did you understand them? Why did you have difficulties with them? What features could be modified to make the warnings more effective?
q1. a young animal has never had much energy. he is brought to a veterinarian for help and is sent to the animal
a discuss an example of how human activities can change the environment. b how would enzyme activity be affected if you
The university policy on extensions of time will be strictly enforced. Extensions will usually only be considered if made via the online system and based on medical or compassionate grounds. Any extension application should be made before the due dat..
What phenotypes will you suppose among the 1024 offspring, and how many of each phenotype would you expect.Suppose that a cross is made between a fly with normal wings.
AIDS is often treated with a "cocktail" of several antiviral agents at once. Why is the cocktail more effective than a single agent? What is a physician trying to prevent by prescribing several drugs at once?
q. a diploid cell contains three pairs of homologous chromosomes designated c1 and c2 m1 and m2 and s1 and s2. no
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