Atoms form bonds to:
A) fill their outer shells with electrons.
B) obtain an equal number of protons and neutrons.
C) fill their outer shells with protons.
D) obtain an equal number of protons and electrons.
E) fill their outer shells with neutrons.
Answer: A
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Paland and Lynch showed that sexual populations possessed fewer deleterious mutations than asexual populations. These results supported the hypothesis that
A. sexual reproduction prevents fertilization with gametes carrying alleles with deleterious alleles. B. sexual reproduction produces fewer random mutations than asexual reproduction. C. asexual reproduction is associated with lower genetic diversity, resulting in the accumulation of highly deleterious mutations. D. in sexual reproduction, the reassorting of alleles allows for the elimination of more detrimental alleles than in asexual reproduction. E. sexual strains are associated with higher genetic diversity and thus accumulate more beneficial mutations than asexual strains.
Which of the following scientific names is written in the correct format?
a. Canis Familiaris b. Canis Lupus c. Canis latrans d. canis Familiaris e. c. Latrans
The following sequence of organisms represents all of the following except trees ® insects ® spiders ® frogs ® fish ® human
A. a food chain.
B. a food web.
C. the flow of energy through the community.
D. the flow of nutrients through the community.
The significance of the Miller–Urey experiment is:
a. that conditions on Earth 4 billion years ago could produce RNA. b. that it is possible to produce LUCA in the laboratory. c. that conditions on Earth 4 billion years ago could produce amino acids. d. that it is possible to produce DNA under the same conditions as on Earth 4 billion years ago.