You discover a new bird species, but so far have only observed ten nesting females. The female birds are small and mostly brown, with a bit of red around their tails and throats. After the eggs hatch, you perform genetic tests which reveal that all chicks within a nest share the same father, but some chicks across nests also share a father. Based on this, what would you predict about the males of this species?
A. They are larger than the females with more coloration.
B. They appear very similar to the females.
C. They are smaller than the females with less coloration.
D. They are similar in size to the females with more coloration.
A. They are larger than the females with more coloration.
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You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal?
A. It has indeterminate cleavage. B. It has determinate cleavage. C. It is a protostome. D. It is an annelid, mollusk, or arthropod. E. It has spiral cleavage.
Beadle and Tatum irradiated Neurospora and initially grew the mutant strains on complete medium
How were they able to determine what type of mutation each strain had? a. By growing the mold on a complete medium with extra vitamins and nutrients. b. By growing the mold on minimal media supplemented with different combinations of amino acids, vitamins, etc. c. By growing the mold in its diploid form to see which traits were masked. d. By comparing Neurospora to other species of mold. e. By observing the marked differences in morphology between the different strains.
Which of the following is a primary structural constituent of the plant cell secondary wall?
A) hemicellulose B) extensin C) collagen D) pectin E) cellulose
Which of the following is an enzyme which results in Staphylococcus aureus being more invasive than Staphylococcus epidermidis?
A) lipase B) M protein C) hyaluronidase D) pyrogens E) neuraminidase