Demographic studies include all of the following except what?
A. sex ratio
B. age structure
C. growth rates
D. measurements of interspecific competition
E. mortality and survivorship curves
Answer: D
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Where are petioles located?
a. at the end of a stem b. between the leaf and stem c. between adjacent nodes d. within vascular bundles
Which of the following statements is TRUE?
A) Oxygen is a product of cellular respiration; carbon dioxide is a product of photosynthesis. B) Lactic acid is a product of aerobic respiration; ethyl alcohol is a product of fermentation. C) Oxidation is the loss of electrons; reduction is the gain of electrons. D) Glucose is a product of aerobic respiration; lactic acid is a product of anaerobic respiration.
The grainy-looking substance inside the nucleus is composed of
A. DNA and proteins. B. phospholipids. C. mitochondria. D. ribosomes. E. nucleoplasm.
When gene mutations cause tumor suppressor genes to turn off, cell growth is
a) apoptosis increases b) uncontrolled and cells proliferate c) doesn't change d) suppressed more