Which of the following is the smallest?

A) atom
B) cell
C) molecule
D) tissue


Answer: A) atom

Biology & Microbiology

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Production of a neurotoxin that binds to target sites on spinal cord neurons responsible for inhibiting skeletal muscle contraction is a characteristic of ________.

A. Clostridium tetani B. Clostridium difficile C. Clostridium perfringens D. Clostridium botulinum

Biology & Microbiology

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

The sum total of behavior patterns of a social group, passed between generations by learning and

symbolic behavior, is a. society. b. folklore. c. culture. d. personality. e. adaptation.

Biology & Microbiology

Fertilization typically occurs in the ____.

A. ovary B. oviduct C. uterus D. cervix E. vagina

Biology & Microbiology