Which is the only trimester to include both the embryo and fetal stages?
What will be an ideal response?
first trimester
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The corpus callosum, which lies between the two cerebral hemispheres of the brain, is actually composed of an extensive network of
A. connective tissue. B. cell bodies. C. nerve tracts. D. blood vessels.
Currently, atmospheric CO2 levels are approximately 400 ppm. The annual mean growth rate in CO2 is about 2 ppm/year. Assuming this trend continues, what would you predict the CO2 level to be in 100 years?
A) 100 ppm B) 200 ppm C) 600 ppm D) 1,000 ppm
Which of the following is NOT accurate about the shoot apical meristem?
A. It is found in the central region of the seedling. B. Its central zone maintains actively dividing cells. C. It gives rise to stems, leaves, and flowers. D. It has an organizing center that preserves the correct number of stem cells. E. Its peripheral zone contains dividing and differentiating cells.
Which of the following is NOT a reason why many species of turtles are now highly endangered?
a. Collection of young turtles for the pet trade. b. Hunting of turtles for their meat. c. Consumption of their eggs by humans. d. Consumption of their eggs by predators. e. Disease.