Social insect colonies are composed of highly specialized groups called what?
A. ecotypes
B. castes
C. filial relatives
D. species
E. clines
Answer: B
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When planting seeds, why should you plant more seeds than you expect to grow?
a. Animals may eat some seeds. b. Some seeds may not germinate. c. The wind may disperse some seeds to an unsuitable environment. d. all of these
Variation that approximates a bell-shaped curve when plotted on a bar graph is
a. undergoing disruptive selection. b. undergoing stabilizing selection. c. quantitative variation. d. qualitative variation. e. in genetic equilibrium.
What forces filtration at the glomerular capsule?
a) An increase in Glomerular blood pressure b) An increase in osmolarity of tubular fluid c) An decrease in angiotensinogen d) A decrease in Glomerular blood pressure
A prokaryotic cell has all of the following EXCEPT ____
a. a plasma membrane b. DNA c. cytoplasm d. a nucleus inside a membrane e. ribosomes