Choose the correct order of tracheal system structures from most external to most internal
a. spiracles, tracheae, tracheal branches, tracheoles
b. tracheoles, tracheae, tracheal branches, spiracles
c. tracheoles, tracheal branches, tracheae, spiracles
d. spiracles, tracheal branches, tracheae, tracheoles
e. spiracles, tracheoles, tracheae, tracheal branches
ANSWER: a
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The endoplasmic reticulum
a. is found in both a rough and a smooth form. b. is the inner membrane of the mitochondria. c. is responsible for packaging proteins for transport. d. manufactures ATP. e. is found in the nucleus as well as in the cytoplasm.
The movement of both oxygen and carbon dioxide in the body is accomplished by
a. exocytosis and endocytosis. b. bulk flow. c. osmosis. d. diffusion. e. facilitated diffusion.
Marsupial animals complete development in
A. a placenta. B. water. C. an egg. D. a pouch.
In a mating between individuals with the genotypes IAi × ii, what percentage of the offspring are expected to have the O blood type?
A) 75% B) 50% C) 0% D) 100% E) 25%