Cell signaling can be classified into
a. three distinct types based on the distance over which the signaling molecules act
b. two distinct types based on the distance over which the signaling molecules act
c. three distinct types based on the signaling molecules
d. none of the above
Answer: a. three distinct types based on the distance over which the signaling molecules act
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All ________ have two very different types of nuclei within their cells, small micronuclei and larger macronuclei.
A. sporozoans B. protists C. oomycetes D. ciliates E. dinoflagellates
Which of the following base changes in DNA is an example of a transition?
A. A to T B. A to G C. C to A D. G to C E. A to C
Cold is preferred for storing food because it retards microbial growth by slowing down metabolic processes
Indicate whether the statement is true or false
The tree in the figure is based on which type of traits, and what is the name of the genus for the most recent horse?
A. Genetic homology: Pliohippus. B. Genetic (DNA): Orohippus. C. Morphological: Equus. D. Morphological: Hyracotherium. E. Molecular: Equus.