In Drosophila, the cells created by cleavage contain different developmental signals from the egg called cytoplasmic
A. determinants.
B. signals.
C. junctions.
D. stem cells.
Answer: A
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Cancer-causing mutations of the cell cycle ____
a. increase the speed of the cycle b. cause the cell to bypass checkpoints in the cycle c. eliminate one or more stages of the cycle d. interfere with S phase of the cycle e. stop the cycle and cause a build-up of cell toxins
The microbial loop results from
A) fungal attack on litter and subsequent consumption by microbivores. B) leaching of litter that stimulates detritivores. C) enhanced decomposition of labile litter materials enhancing food web turnover. D) exudate release in the rhizosphere stimulating decomposition and nutrient release.
The exchange of genetic material during crossing over causes which of the following?
A) homozygosity B) genetic variation C) heterozygosity D) stasis
DNA replication occurs by adding ________
A) NTPs to the 5? end of the daughter strand B) dNTPs to the 5? end of the template strand C) NTPs to the 3? end of the daughter strand D) dNTPs to the 3? end of the template strand E) dNTPs to the 3? end of the daughter strand