If an ecosystem has a carrying capacity of 1,000 individuals for a given species and 2,000 individuals of that species are present, we can predict that the population
A) size will remain at equilibrium.
B) size will decrease.
C) will show a clumped dispersion pattern.
D) size will slowly increase.
Ans: B) size will decrease.
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Which one is not a function of the BRCA genes? a. Checkpoint proteins during mitosis and meiosis
b. Monitor the DNA strand. c. Maintain the integrity of the cell's chromosomes. d. All of these choices. e. Repair breaks in the DNA strand.
Overdrawing water from an aquifer can lower the ____
a. evaporation levels b. precipitation levels c. water table d. quality of drinking water e. salt content
How does azidothymidine (AZT) fight AIDS?
A) It blocks the virus from entering the cell. B) It targets the virus for destruction. C) It blocks the enzyme that converts viral RNA to DNA. D) It blocks the enzyme that assembles all of the parts into new viruses.
Asexual reproduction produces genetically identical individuals because
a. chromosomes do not have to replicate during asexual reproduction. b. it involves chromosome replication without cytokinesis. c. no meiosis or fertilization take place. d. cell division occurs only in meiosis. e. the mitotic spindle prevents nondisjunction.