Paracellular transport is associated with which of the following?
A) adherens junctions
B) integrins
C) desmosomes
D) tight junctions
E) hemidesmosomes
D) tight junctions
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Which of the following likely contributed to the diversification of angiosperms? Select all correct choices
A. wind-based pollination B. animal-based pollination C. a large female gametophyte D. a small female gametophyte E. increased rates of photosynthesis F. decreased rates of transpiration
The type of muscle that typically surrounds hollow tubes and organs like the stomach is
A. cardiac muscle. B. striated muscle. C. smooth muscle. D. skeletal muscle. E. voluntary muscle.
The breakup of large areas of habitat into small, isolated patches is called:a
extinction. b. habitat fragmentation. c. invasive species. d. unsuitable territory. e. habitat endangerment.
Biologists suspect that endosymbiosis gave rise to mitochondria before plastids partly because
a. the products of photosynthesis could not be metabolized without mitochondrial enzymes. b. almost all eukaryotes have mitochondria, whereas only autotrophic eukaryotes generally have plastids. c. mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA. d. without mitochondrial CO2 production, photosynthesis could not occur. e. mitochondrial proteins are synthesized on cytosolic ribosomes, whereas plastids utilize their own ribosomes.