Many male songbirds have very distinctive songs that are used to attract females. These songs are an example of a ________ isolating mechanism.
A. postzygotic, ecological
B. prezygotic, behavioral
C. prezygotic, temporal
D. postzygotic, mechanical
E. prezygotic, gamete fusion
B. prezygotic, behavioral
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In the food chain below, what does the blue jay represent? crabgrass—cricket—garden spider—blue jay—red-tailed hawk
A. herbivore B. primary producer C. primary carnivore D. secondary carnivore E. detritivore Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? 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?
During anaphase II of meiosis,
A. the centrioles form. B. daughter cells form. C. chromosomes move to poles. D. chromatids exchange parts.
We would expect that a 15-nucleotide sequence that includes a stop codon at the end (as part of the 15-nucleotide sequence) will direct the production of a polypeptide that consists of
A) two amino acids. B) three amino acids. C) four amino acids. D) five amino acids.
What is the body's primary source of energy?
a. electrolytes b. protein c. glucose d. insulin