During cytokinesis, a critical step in septation is the assembly of the
A. spindle body.
B. replisome.
C. cytoskeletal spiral.
D. Z ring.
Answer: D
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The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmospheric CO2 gas over the last 25 years.
Answer the following statement true (T) or false (F)
Nitrogen-fixing bacteria convert atmospheric nitrogen (N2 gas) into ammonium (NH4). Why is this conversion important for life on Earth?
A. Nitrogen gas is toxic. B. Ammonium is an important cleaning agent. C. Nitrogen gas leads to global warming. D. Ammonium is a very important plant nutrient.
Topic 2.10 - Terrestrial microbes
What will be an ideal response?
The diversity of haploid daughter cells is increased by the independent assortment of chromosomes at anaphase and by
a. crossing over and recombination. b. somatic mutation. c. chromosome elimination. d. the selection of the fittest sperm.