When hermit crabs crawl across the ocean floor, they often have sea anemones attached to their backs. The anemones use their dangerous tentacles to keep hermit crab predators at bay, and they dine on the particles of food that the crab does not eat. This
is an example of
A) bioremediation.
B) alternation of generations.
C) symbiosis.
D) endosymbiosis.
Answer: C
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You and your friends are hiking the Appalachian trail in North Carolina. You run out of water and your friends want to fill up from a beautiful clear stream in the middle of the forest. What precautions should you take before drinking the water and why?
What will be an ideal response?
What is the best definition of a population?
a. a group of individuals of two different species that interact with each other b. a group of interbreeding individuals from different geographical regions c. a group of potentially interbreeding individuals of the same species regardless of where they live d. a collection of different species living in the same area at the same time e. a group of interbreeding individuals of the same species in a given area
Which of the following ultimately provides the O2 used during the process of oxidative phosphorylation
-fermentation -light reactions of photosynthesis -Calvin cycle of photosynthesis -Krebs cycle -carbon fixation
A positive feedback loop is one that tends to amplify a process. Why would the effect of deforestation on the water cycle be considered a positive feedback loop?
A. Because deforestation leads to reduced nutrient uptake during the growing season, which results in more fertile soil. B. Because deforestation leads to new types of habitat which leads to greater species diversity. C. Because deforestation leads to an increase in the concentration of nutrients in run off, which then leads to eutrophication. D. Because deforestation leads to a decrease in precipitation, which results in further loss of vegetation.