The ability to maintain an upright position is due to ________ muscle contractions
Fill in the blank(s) with correct word
isometric
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If you sampled the genetic characteristics of a large
population and found that of the 50 loci analyzed there is very little, if any, variation, the most likely explanation is that a. a uniform environment selected for these alleles. b. there has been a lack of migration, and the genetic equilibrium stabilized the population. c. strong selection pressures eliminated alternative alleles. d. a bottleneck effect may have occurred in the past to reduce the variability in the population. e. a combination of low mutation rates and differential sexual selection produced these results.
All of the following features are true of primates except
A. they belong to the order containing lemurs, monkeys, and apes. B. they have binocular vision. C. they have prehensile tails. D. they are mammals with grasping fingers and toes.
Nucleic acid hybridization is based on the fact that
A) the strands of DNA can be separated. B) a chromosome is composed of complementary strands. C) pairing between complementary bases occurs. D) DNA is composed of genes. E) all cells have DNA.
What is the most likely consequence of a mutation that causes sporopollenin to degrade quickly after it is synthesized?
A. a decrease in the number of sperm that can be produced B. a reduction in the ability of pollinators to detect and transfer pollen grains to a stigma C. a decrease in the ability of the pollen grain or spore to open when a suitable location is found D. a reduction in the ability of the integument of an ovule to develop into a seed coat E. a reduction in the ability of pollen and spores to disperse to new areas