Polyploidy refers to an individual ____ and occurs most often in ____
a. with one or more additional sets of chromosomes; animals
b. with one or more additional sets of chromosomes; plants
c. lacking one or more sets of chromosomes; plants
d. lacking one or more sets of chromosomes; animals
e. lacking individual chromosomes; animals
ANSWER: b
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Immediately after an action potential passes along an axon, it is not possible to generate a second action potential. Thus, we state that the membrane is briefly _____
A) hyperexcitable B) refractory C) fully depolarized D) above threshold E) at the equilibrium potential
The protective outer covering of a seed is called the ____
Fill in the blank with the appropriate word.
Oxygen-containing ions are used by some bacteria in their electron transport system.
Answer the following statement true (T) or false (F)
Which pieces of evidence would be considered the best for establishing biological relatedness?
A) birth certificates B) pictures from family reunions C) testimony from relatives D) a very close match in the DNA profile