The fact that during gamete formation, the segregation of alleles for a gene on one chromosome does not influence the segregation of alleles for a gene on another chromosome is Mendel's law of
a. random fertilization.
b. crossing over.
c. population dynamics.
d. segregation.
e. independent assortment.
Answer: e. independent assortment.
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Which of the following is least likely to be part of a cell membrane?
A) proteoglycans B) phospholipids C) glycoproteins D) transport proteins E) enzymes
Evidence for the endosymbiotic theory includes ____
a. RNA in prokaryotes, mitochondria, and chloroplasts arranged in a single, circular genome b. endocytosed cells observed to survive in the cytoplasm of the host cell c. endocytosed organelles observed to survive free in the environment d. fossils of prokaryotic cells in the process of endocytosing cyanobacteria e. rRNA sequences that are unique to prokaryotes, mitochondria, and chloroplasts
If all prokaryotes on Earth suddenly vanished, which of the following would be the most likely and most direct result?
A) Human populations would thrive in the absence of disease. B) Bacteriophage numbers would dramatically increase. C) The recycling of nutrients would be greatly reduced, at least initially. D) There would be no more pathogens on Earth.
If you examine the soil profile revealed by a fresh road cut, which feature will you probably find in the B horizon?
A) an abundance of worms and burrowing insects B) an abundance of decomposing organic material C) an abundance of fine clay but not much organic material D) a predominance of slightly weathered rock and gravel