A coelom
A. is located between the outer body wall and the gut.
B. filled with air.
C. only found in vertebrates.
D. All of these answers are true.
A. is located between the outer body wall and the gut.
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What is the process through which many animals develop irreversible species-specific behavior patterns?
A. altruism B. taxis C. operant conditioning D. cognitive learning E. imprinting
How many chromosomes will be found in each daughter cell of C. elegans after it undergoes
mitosis?
a. two b. four c. six d. impossible to tell
The stage during which chromosomes shorten by condensing their nucleoprotein is called
A. anaphase. B. metaphase. C. prophase. D. telophase.
Electrical excitation for heart contraction originates in the ________ .
a. atrioventricular (AV) node b. Purkinje fibers c. intercalated disc d. sinoatrial (SA) node e. cardiac muscle cells