Gas exchange requires a surface that is both ________

A) durable and stiff
B) protected within the body and connected to the circulatory system
C) thin and moist
D) permeable to oxygen and impermeable to carbon dioxide


C

Biology & Microbiology

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In a vertebrate, which of the following is NOT

a part of the axial skeleton?

a. skull b. ribs c. vertebrae d. knee e. tail

Biology & Microbiology

Which of the following represents an extinct lineage of jawed fishes that are also called spiny sharks?

a. placoderms b. ostracoderms c. acanthodians d. conodonts

Biology & Microbiology

When cells are in an isotonic solution, they _______ wate

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The difference in sizes between male and female gametes results from two unequal divisions of __________________ in female gamete development.

A) cytoplasm B) nuclei C) mitosis D) chromosomes E) DNA

Biology & Microbiology