Paleontological studies indicate that, over millions of years,
A. groups of species that have coevolved rise and go extinct together.
B. species that occurred together in the distant past still occur together today; the community has held constant.
C. the extinction of species is not related to the community in which they lived.
D. species seem to come and go individually as niches within a community become available.
E. species richness is constant over time.
D. species seem to come and go individually as niches within a community become available.
You might also like to view...
Extensive horizontal gene transfer between domains greatly simplifies the construction of phylogenetic trees.
Answer the following statement true (T) or false (F)
Which of the following statements about progeria is false? a. Progeria arises from a mutation in the gene for lamin
b. Progeriacs die of diseases usually seen in the elderly, like stroke or heart attack. c. The symptoms of progeria begin before age two. d. Progeria can run in families because parents may be unaffected carriers.
Microtubules are not involved in
a. movement of chromosomes during mitosis. b. transport of membranous vesicles in the cytoplasm. c. cytokinesis of animal cells. d. movement of cilia and flagella. e. positioning of Golgi in cells.
Biological membranes are held together mainly by
a. hydrogen bonds between lipid molecules. b. hydration layers over lipid molecules. c. exclusion of the nonpolar regions of lipids by water. d. hydrogen bonds between water molecules. e. surface tension at the interface between layers of water molecules.