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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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 starting substrate for vinegar production is ________.
A. a salt solution B. water C. fruit juice D. an alcoholic solution
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