Global air circulation patterns affect climate and the distribution of __________. Fill in the blank(s) with the appropriate word(s)
biomes
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When does recombination of genes, as a result of crossing over, occur during the cell cycle?
a. prophase I b. prophase II c. metaphase I d. metaphase II
Young male white-crowned sparrows ____ appropriate song, which is related to _______
a. are born with; estrogen b. are born with; testosterone c. learn; neuron clusters in the testes d. learn; neuron clusters in the brain e. learn; estrogen
Two ways in which new alleles can become incorporated in a population are
a. mutation and genetic drift. b. selection and genetic drift. c. selection and mutation. d. mutation and gene flow.
Answer questions 86–90 in reference to the five divisions of
vascular plants listed below. a. lycophytes b. bryophytes c. monocots d. conifers e. eudicots E 86. In members of this group the gametophyte is the dominant generation. D 87. The giant club mosses of the Carboniferous period were members of this group. M 88. Orchids are members of this group. D 89. Members of this group are heterosporous with welldeveloped seed and pollen-bearing cones. M 90. Members of this group have seeds containing two cotyledons enclosed in an ovary.