________ are cyclic nitrogenous bases with two rings and pronounced aromatic properties.
A. Quinones
B. Purines
C. Amino acids
D. Fatty acids
Answer: B
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Prostaglandins are ____
a. protein molecules that act either by paracrine or autocrine mechanisms. b. fatty acid derivatives that act either by paracrine or autocrine mechanisms. c. neurotransmitters that act by paracrine mechanisms. d. amine molecules that act by neuroendocrine mechanisms. e. steroid molecules that are lipid soluble.
Under warm conditions, you will not have goose bumps because the arrector pili muscles ________
Fill in the blank(s) with correct word
When two species contain identical or nearly identical molecules such as proteins, this suggests
A) genetic modification has occurred to the populations. B) the two species share a common ancestry. C) the two species are in fact only one species displaying divergent evolution. D) the two species are in fact only one species displaying convergent evolution. E) the two species overlap in niches and likely share a common diet.
What features of GM crops make them appealing to farmers? Select all that apply.
a. drought tolerance b. less herbicide use c. increased food yields d. insect resistance