Why are bacterial decomposers important?
a. Most cause disease.
b. They produce spores.
c. They fix nitrogen.
d. Common in biotechnology.
e. They break down complex organic molecules in wastes and remains.
e
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Why do endotherms need to be well insulated from the external environment?
What will be an ideal response?
Carbon is introduced into the atmosphere by
all EXCEPT which of the following means? a. respiration b. diffusion c. burning of fossil fuels d. wind erosion of rocks e. tilling of soil
What unique structural adaptations are found in the mammalian brain that allowed mammals to become adept at higher mental activities?
A. A more direct connection to the spinal cord for faster conduction of neural impulses. B. An increased number of blood vessels that increases the vascularization of the brain. C. A higher degree of crevasses and folds in the neocortex that increases the surface area of the brain. D. An enlarged pons. E. A cranium that will protect the brain from damage.
Which of the following is true about the second meiotic division?
A) Sister chromatids are pulling apart. B) Homologous chromosomes are pulling apart. C) The products are four identical gametes. D) Nondisjunction would lead to extra bivalents forming. E) Synapsis occurring in the second meiotic division.