The gene that governs a cell's ability to synthesize biotin from inorganic precursors is labeled “bio”. The designation
bio+ indicates the ____.
a. normal allele
b. mutant allele
c. bacterium is biologically active
d. bacterium is biologically inactive
e. bacterium cannot make its own biotin
ANSWER: a
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Evidence suggests that the crocodiles are more closely related to the birds than the turtles and snakes. If so, then including crocodiles, but not birds, in the Class Reptilia would make the Class Reptilia
A. a monophyletic group. B. a paraphyletic group. C. a polyphyletic group. D. parsimonious. E. not homologous. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about monophyly? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Under which of the following taxonomic levels does E. coli fall?
a. species b. order c. class d. kingdom
The inner cell mass of the blastocyst develops into the ____
a. amnion b. zygote c. embryo d. yolk sac e. placenta
Red-green color blindness is a sex-linked trait. A woman with normal color vision, whose father was color blind, mates with a color blind man. What chance do each of their sons have of being color blind?
A. 100% chance B. 10% chance C. 0% chance D. 50% chance