What is the difference between geothermal energy and Ground Source Heat Pumps (GSHP)?
A. GSHP's are limited to areas with geothermal activity.
B. Geothermal energy is limited to areas with geothermal activity.
C. Geothermal energy is limited to heating and cooling, but GSHP's can power a whole community with electricity.
D. GSHP's are limited to heating and cooling, but geothermal energy can power a whole community with electricity.
E. Both B and D are differences.
Ans: E. Both B and D are differences.
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An example of density-dependent regulation is shown in this graph with results from a study focusing on the giant intestinal roundworm (Ascaris lumbricoides), a parasite of humans and other mammals. Denser populations of the parasite contained fewer eggs. One possible explanation for this is that females would be smaller in more dense populations (due to limited resources) and that smaller females would have fewer eggs. This hypothesis was tested and disproved in a 2009 study which showed that female weight had no influence. Given that each female was producing fewer eggs, why was the population continuing to grow?
a. More worms were moving in from adjacent populations.
b. The population was expanding due to increased mating.
c. With lower population densities, mortality decreased.
d. Lifespans were extending due to lower egg production.
The fusion of the cytoplasms of two genetically different cells is ____
a. osmosis b. karyogamy c. cytoplasmic streaming d. plasmogamy e. symbiosis
Which is found in slime molds but not in fungi?
A. nonmotile spores B. flagellated cells C. zygote formation D. photosynthesis E. chitin in cell walls
Why do most angiosperms have alternate phyllotaxy, with leaf emergence at an angle of 137.5° compared to leaves above and below?
A) To allow maximum exposure to light B) To promote a leaf area index above 8 C) To reduce shading of lower leaves D) To allow maximum exposure to light and to reduce shading of lower leaves