Which animals are ectothermic?
A) frogs and mammals
B) lizards and birds
C) turtles and lizards
D) birds and mammals
Answer: C
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Functionally speaking, a nerve impulse is
a. a flow of electrons along the outside of the plasma membrane of a neuron. b. the movement of cytoplasmic elements through the core of the neuron. c. a series of changes in membrane potential. d. a lengthening and shortening of the membrane extensions of a neuron. e. a turning on and off of the sodium-potassium pumps of a neuron.
If a(n) intron containing a human gene sequence is inserted into a prokaryote cell, that molecule will
produce a functional protein product. __________________ Indicate whether the statement is true or false.
"At one time there was a shallow pond in this area. Now it has all filled in and is a field." This statement would best describe
A. climax community. B. primary succession. C. secondary succession. D. pioneer community.
In which eukaryotic organelle are various macromolecules broken down and destroyed?
A) the Golgi apparatus B) endoplasmic reticulum C) mitochondria D) lysosome