What possible harmful environmental effects are of concern regarding GM crops?
A) the decreased use of herbicides when GM crops are herbicide-resistant
B) the transfer of genetically modified genes to weedy relatives
C) the reduction of genetic diversity in all crops
D) an increase in allergic reactions in sensitive humans
B
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In what types of organisms do plasmodesmata serve as a mechanism of cell-cell communication?
A. protists B. plants C. those types of organisms that spend only a portion of their life cycle in a multicellular state D. animals
Phagocytosis (Phagotrophy) is:
A. attack of cells by bacteriophages B. the phases through which cells pass during division C. the disintegration of a cell D. the attachment of protist cells to a substrate E. the capture of food particles by a cell
The structure in Figure 27-3 labeled 4 is:
a. haploid. b. diploid. c. polyploid. d. a zygote. e. produced by meiosis.
The cardinal sign of overhydration is:
A) edema. B) dyspnea. C) hypertension. D) tachycardia.