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
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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
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
When cells are in an isotonic solution, they _______ wate
Fill in the blank(s) with the appropriate word(s).
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