What was the probable source of gases
constituting the early atmosphere?
a. other planets orbiting the sun but close
enough to the early earth
b. meteorites
c. volcanoes
d. stromatolites
e. comets
C
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Which of the following statements is true regarding the parasexual cycle demonstrated by some fungi? Select all correct choices
A. It involves mitotic recombination. B. It involves meiotic recombination. C. Chromosomes are lost until haploid (1n) cells are achieved. D. Chromosomes are added until haploid (1n) cells are achieved. E. The parasexual cycle produces dikaryotic (n+n) cells.
The best control for your experiment in the question above is a tree in which you __________ and you measure the abundance of _____________ over time. remove the ants and the aphids; other insects
A. do not remove any insects; ants B. do not remove any insects; aphids C. add a second ant species; the first ant species D. Actually, the control is built into the original experiment; you do not need to set up a separate control.
The autoimmune disorder that involves a progress loss of myelin is ____
a. epilepsy b. Parkinson’s disease c. Alzheimer’s disease d. meningitis e. multiple sclerosis
The axon of one neuron is functionally connected to the dendrite of an adjacent neuron by the
_____________________. Fill in the blank(s) with the appropriate word(s).