A sea squirt is an example of a
A. tunicate.
B. fish.
C. lancelet.
D. amphibian.
E. mammal.
A. tunicate.
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Genes in the Hox family of homeobox genes control the body plans of animals along the ____ axis, including where
____ will develop on the animal’s body.
a. dorsal-ventral; appendages b. dorsal-ventral; light-sensing organs c. internal-external; internal organs d. anterior-posterior; appendages e. anterior-posterior; light-sensing organs
If a male produces healthy gametes but his female partner can neither produce gametes nor carry a fetus, a(n)
____________________ surrogate can be used to help them achieve successful reproduction. Fill in the blank(s) with the appropriate word(s).
Who proposed the concept of chemotherapy, that compounds might selectively kill pathogens without harming people?
A) Gerhard Domagk B) Alexander Fleming C) Paul Ehrlich D) Selman Waksman E) Joseph Lister
The structure that attaches a chromosome to a microtubule is called a(n)
a. centriole. b. MAR. c. kinetochore. d. spindle. e. MTOC.