How could the decline of the population of anchovies off Peru preclude a future rebound in this population in and of itself even if, in the future, there was enough food in the water to support the growth of large populations of anchovies?
What will be an ideal response?
When the anchovy population declines other fish species that occupy a similar niche to that of the anchovies, such as sardines, will explode in numbers due to the reduced competition with declining anchovies. As a result, a fledgling population of anchovies will find it difficult to compete with an established population of sardines when conditions in the water get better.
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Agrobacterium
A. contain the Ti plasmid that modifies the growth of plant tissue. B. produce antibiotics. C. infect animal cells. D. resemble fungus.
The process of linking the correct amino acid to a tRNA molecule is catalyzed by ____
a. the tRNA itself b. RNA polymerase c. an mRNA d. the ribosome e. an aminoacyl-tRNA synthetase
Totipotency is a term used to describe a cell's ability to give rise to a complete new organism. In plants, this means that _____
A) plant development is not under genetic control B) the cells of shoots and the cells of roots have different genes C) cell differentiation depends largely on the control of gene expression D) a cell's environment has no effect on its differentiation
Because bacteria are prokaryotes, they do not have DNA.
Answer the following statement true (T) or false (F)