Megakaryocytes fragment to produce
a. red blood cells.
b. lymphocytes.
c. platelets.
d. eosinophils.
e. neutrophils.
Answer: c
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Which of these is/are considered lateral meristem(s)?
a. apical meristems only b. vascular cambium only c. cork cambium only d. pericycle and periderm e. vascular cambium and cork cambium
Some friends are trying to make wine in their basement. They've added yeast to a sweet grape juice mixture and have allowed the yeast to grow
After several days, they find that sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. The most likely explanation is that ________. A) the mixture needs more sugar; yeast need a lot of energy before they can begin to produce alcohol B) the mixture needs less oxygen; yeast only produce alcohol in the absence of oxygen C) the mixture needs more oxygen; yeast need oxygen to break down sugar to produce alcohol D) the mixture needs less sugar; high sugar concentrations stimulate cellular respiration, and alcohol is not a by-product of cellular respiration
Four of the five answers listed below are stages of actual nuclear division. Select the exception
A) Prophase B) Anaphase C) Interphase D) Metaphase E) Telophase
Microevolution, or evolution at its smallest scale, occurs when
A) an individual's traits change in response to environmental factors. B) a community of organisms changes due to the extinction of several dominant species. C) a new species arises from an existing species. D) a population's allele frequencies change over a span of generations.