Which of the following does not contribute to limits on population growth?
a. snakes feeding on mice in a cornfield
b. bears having two cubs
c. the amount of light for photosynthesis
d. a disease-causing organism entering a population
e. an increase in the total rainfall in a normally dry environment
B
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The first fungi were most likely ____
a. airborne b. terrestrial c. arboreal d. aquatic e. amphibious
The gray crescent region of the amphibian zygote is thought to contain:a
growth factors and developmental determinants. b. hormones and ribosomes. c. yolk and dark pigment granules. d. mitochondria and ribosomes. e. neurotransmitters and hormones
How does the circulatory system of an annelid differ from the circulatory system of a gastropod?
What will be an ideal response?
If you experimentally increase the concentration of Na+ outside a cell while maintaining other ion concentrations as they were, what would happen to the cell's membrane potential?
What will be an ideal response?