A sea squirt is an example of a

A. tunicate.
B. fish.
C. lancelet.
D. amphibian.
E. mammal.


A. tunicate.

Biology & Microbiology

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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

Biology & Microbiology

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).

Biology & Microbiology

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

Biology & Microbiology

The structure that attaches a chromosome to a microtubule is called a(n)

a. centriole. b. MAR. c. kinetochore. d. spindle. e. MTOC.

Biology & Microbiology