If natural selection would select against organisms with a nucleus, which one of the following organisms would survive and evolve?
A) archaea B) protists C) fungi D) plants
Answer: A
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According to the principle of segregation, a heterozygous plant with alleles Aa will produce:
A. gametes with only the A allele. B. gametes with only the a allele. C. 50% of gametes with the A allele and 50% of gametes with the a allele, on average. D. gametes in the ratio of 3 A alleles:1 a allele. E. some gametes with the A allele and some with the a allele, but in no predictable ratio.
Which of the following populations is most likely to evolve?
A. a population of bacteria living in a thermal vent B. a population of bacteria living in a vernal pool C. a population of bacteria living in the equatorial rainforest D. a population of bacteria living in the arctic circle
A mutation in the B genes of Arabidopsis would result in the incorrect formation of what structure?
A. Apical meristem B. Flowers C. Stems D. Roots
A gelatinous fluid inside the chloroplast containing ribosomes, DNA, and enzymes is the
A. chlorophyll. B. mitochondrion. C. stroma. D. thylakoid. E. granum.