Which of these classification categories contains the closest related organisms?
(a). domain
(b). genus
(c). family
(d). phylum
(e). kingdom
(b). genus
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Four of the five answers correctly describe trends in plant evolution. Select the exception
a. nonvascular to vascular b. sporophyte dominant to gametophyte dominant c. motile to nonmotile gametes d. seedless to seeds e. haploid to diploid dominance
If a sheep and goat are mated, their offspring dies as an embryo. This is an example of reproductive isolation.
A. prezygotic B. parapatric C. allopatric D. sympatric E. postzygotic
Who promoted the idea that some diseases, especially chronic diseases, have a multifactorial etiology
a. William Farr b. William Farrell c. Thomas Edison d. William Smith
Which statement about steroid hormones is true?
A) Steroid hormones cause the production of cAMP. B) Steroid hormones are polar molecules that cannot pass through the cell membrane. C) Steroid hormones bind to receptors in the plasma membrane. D) Steroid hormones bind to specific receptor proteins, and the complex acts as a gene activator.