All invertebrates have phagocytic cells, but lack antibodies
Indicate whether the statement is true or false.
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Which of the following is NOT associated with leaf abscission?
A. development of suberin impregnated cork cells B. cell wall development C. development of a separation layer D. water stress E. deciduous trees
The mammalian acrosome contains enzymes that ____
a. digest the zona pellucida b. digest the endometrium c. stimulate ovulation d. stimulate sperm motility e. inhibit premature ejaculation
Which of the following statements is false?
a. Most of the genes of the nucleus are inactive during early cleavage. b. The particular sector of the egg cytoplasm helps control the differences among cells. c. The amount of yolk present in the egg influences cleavage patterns. d. The zygote does not increase its cytoplasm, so cells resulting from cleavage of the zygote are smaller than the original zygote. e. Blastomeres receive identical maternal messages.
If a cell contained a mutation in the gene that encodes FtsZ, which process would be affected?
A. septation B. DNA Synthesis C. cohesin cleavage D. prophase E. cytokinesis