How are sister chromatids connected to each other?
A. Through complementary base pairing of DNA at the centromere
B. Through centromere proteins that are attracted to each other by opposite charges
C. Through activated cyclin/CDK complexes
D. Through the centrioles
E. Through cohesion proteins
E. Through cohesion proteins
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The appearance of a novel phenotype resulting from the substitution of a single base pair might be due to
A) a change in the amino acid sequence. B) a change in the amount of protein expressed. C) an alteration in a gene that codes for a nontranslated RNA. D) a change in the developmental time or location at which a gene is expressed. E) All of the choices are possible consequences of a single base pair substitution.
_____ refers to activities by which cells acquire and
use energy. a. Condensation b. Hydrolysis c. Synthesis d. Metabolism e. Dehydration
Little parental care is required by ________ offspring, which are able to move about and forage for themselves shortly after birth
Fill in the blank(s) with correct word
Refer to the accompanying figure. Which structure is the blastocoel?
a. 1
b. 2
c. 3
d. 4
e. 5