The mature male gametophyte is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: d
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The parts of the genome that are used in markers of identity in DNA profiling
A) are in Hardy-Weinberg equilibrium and therefore not affected by natural selection acting on a phenotype. B) are in Hardy-Weinberg equilibrium and therefore not affected by natural selection acting on a genotype. C) are not in Hardy-Weinberg equilibrium and therefore not affected by natural selection acting on a phenotype. D) are not in Hardy-Weinberg equilibrium and therefore not affected by natural selection acting on a genotype.
Crossing over is one of the most important events in meiosis because
a. it produces new combinations of alleles on chromosomes. b. homologous chromosomes must be separated into different daughter cells. c. the number of chromosomes allotted to each daughter cell must be halved. d. homologous chromatids must be separated into different daughter cells. e. the number of chromosomes allotted to each daughter cell must be split in fourths.
The most vulnerable organisms to the effects of DDT
are a. producers. b. herbivores. c. primary carnivores. d. decomposers. e. top carnivores.
Creating conditions in the laboratory that promote the growth of some microbes while inhibiting the growth of others is called
A) complex culturing. B) reducing conditions. C) enrichment culturing. D) transport conditions. E) differential culturing.