The unifying theme in biology is
a. ecology
b. genetics
c. metabolism
d. evolution
e. taxonomy
Ans: d. evolution
Biology & Microbiology
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Of the four types of T cells, only the ____________________ T cells destroy infected body cells
Fill in the blank(s) with correct word
Biology & Microbiology
The internal skeleton of echinoderms is made of calcium-stiffened ____ that develop from mesoderm
a. ampullae b. ossicles c. radial canals d. ring canals e. madreporites
Biology & Microbiology
In what year did chemists begin developing synthetic toxins to protect crops?
a. 1865 b. 1900 c. 1925 d. 1945 e. 1960
Biology & Microbiology
Dead or damaged cells are replaced by the process of ________
A) fertilization B) binary fission C) meiosis D) mitosis
Biology & Microbiology