Temperate grasslands and temperate deciduous forests are two different biomes that are located in the same latitudes. Which one of the following abiotic conditions is most likely to account for the differences in their community composition?
A. Sunlight
B. Temperature
C. A rain shadow
D. Precipitation
E. Soil nutrients
Answer: D
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In the Ecotron experiments of Shahid Naeem and colleagues, it was found that higher values of vegetative ground cover were correlated with: Check all that apply.
_____ higher community productivity _____ lower nutrient uptake _____ increased decomposition rates _____ lower species richness _____ higher plant biomass
Which of the following is not involved in muscle contraction?
1.An action potential that releases ACh at the neuromuscular junction. 2.An action potential that releases norepinephrine at the neuromuscular junction. 3.An action potential carried by T tubules. 4.Opening of voltage gated channels in the sarcoplasmic reticulum.
Respiration is a physiological process by which O2
enters the internal environment and CO2 leaves by diffusing across a __________. Fill in the blank(s) with the appropriate word(s).