If you are studying the physical forms that organisms take, you are studying:

A) vestigial characters. B) morphology.
C) comparative embryology. D) polygenic inheritance.


Answer: B

Biology & Microbiology

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Identical twins can result from ____

a. the fusion of two sets of identical gametes b. a division of a zygote into two separate cells that develop into two separate embryos c. the fusion of two paternal gametes with a single maternal gamete that then divides d. a lack of chromosomal separation during meiosis resulting in gametes that are diploid e. a mechanism that is not understood

Biology & Microbiology

Peter Sheldon found that the number of tail “ribs” in ____ changed over a 3 million year period with no evidence of

speciation.

a. horses b. trilobites c. insects d. humans e. ectoprocts

Biology & Microbiology

Altruism in animals

a. lowers their chances of perpetuating their own genes. b. has no genetic basis. c. is a conscious effort to preserve the species. d. is just lucky behavior. e. includes none of these

Biology & Microbiology

Which portion of the testes produces sperm?

a. Leydig cells b. interstitial cells c. epididymis d. seminiferous tubules e. Sertoli cells

Biology & Microbiology