Self-incompatibility in flowering plants is a biochemical recognition and rejection process that
a. prevents both self-fertilization and self-pollination.
b. prevents self-pollination and occasionally prevents self-fertilization.
c. prevents self-fertilization but not self-pollination.
d. prevents self-pollination but not self-fertilization.
e. prevents self-fertilization and occasionally prevents self-pollination.
C
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In humans, the condition of male pattern baldness is an example of a(n)
A. allele. B. genotype. C. gene. D. locus. E. phenotype.
What percent of all species that have existed
have gone extinct?
a. 10 b. 25 c. 55 d. 75 e. 99
A nucleotide may contain a(n)
a. base. b. 5-carbon sugar. c. phosphate group. d. adenine. e. all of these
Operons can best be defined as
A) operational mutations affecting gene expression. B) a set of genes under common regulatory control. C) dominant alleles responsible for enzyme synthesis. D) a balance between repressor and inducer molecules. E) a common mode of gene expression in bacteria.