Which of the following groups of vertebrates exhibits a "flow through" respiratory system?

A. mammals
B. birds
C. amphibians
D. fishes
E. birds and fishes


E. birds and fishes

Biology & Microbiology

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The starting substrate for vinegar production is ________.

A. a salt solution B. water C. fruit juice D. an alcoholic solution

Biology & Microbiology

What type of pressure is not placed upon the environment as crop production expands? a. Pesticide runoff into the rivers

b. Runoff clogging rivers. c. Increase in irrigation. d. Loss of topsoil. e. Additional habitat available for many species.

Biology & Microbiology

The chorion is the extraembryonic membrane closest to the embryo proper. Indicate whether the statement is true or false

Biology & Microbiology

Which component of the flowering plant is considered the female portion of the plant?

A. corolla B. carpel C. stamen D. style

Biology & Microbiology