Life originated on earth in which of the following distinct phases?
a. formation of small molecules containing carbon and hydrogen
b. formation of self-replicating information-containing molecules
c. development of a membrane enabling metabolism and creating the first cells
d. None of the above is correct.
e. All of the answer options are correct.
Ans: e. All of the answer options are correct.
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Detecting a specific protein with an antibody is considered a(n) ________ method
A) selection B) screening C) isolation D) duplication
For a species with four pairs of chromosomes, ________ chromosome combinations are possible
A) 4 B) 8 C) 16 D) 20
Which of the following statements regarding sexual and asexual reproduction is true?
A) Cell division only occurs after sexual reproduction. B) Only offspring from asexual reproduction inherit traits from two parents. C) Sexual reproduction typically includes the development of unfertilized eggs. D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.
Transfer of genes between organelles and the nucleus:
a. occurred in the past. b. only happens between the mitochondria and the nucleus. c. only happens between the chloroplast and the nucleus. d. is still ongoing.