What does sustainability mean? What strategies might be employed to reach sustainable levels of agriculture?
What will be an ideal response?
The best responses will include discussions of the following topics: balancing human needs with the available resources; crop rotation; use of natural fertilizers; and integrated pest management. Thoughtful answers will include discussions of biodiversity and the impact of sustainability on society.
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When receptors coupled to phospholipase C are activated, calcium levels in the cytosol increase when ______
A. diacylglycerol binds to ligand-gated channels on the endoplasmic reticulum, releasing calcium. B. IP3 binds to ligand-gated channels on the plasma membrane, releasing calcium. C. diacylglycerol binds to ligand-gated channels on the plasma membrane, releasing calcium. D. IP3 binds to ligand-gated channels on the endoplasmic reticulum, releasing calcium. E. phospholipase C phosphorylates the receptor leading to calcium production.
Simple sequence repeat loci are highly variable because of what process?
A) repair of double strand breaks that result from exposure to X-rays B) exposure to DNA damaging chemicals found in food and water C) the formation of thymine dimers by ultraviolet light D) slipped mispairing during DNA replication
Arteries carry
a. blood away from the heart. b. blood towards the heart. c. only oxygen-rich blood. d. only oxygen-poor blood. e. a combination of more than one of these
Why does red and blue light support the highest rates of photosynthesis?
a. These wavelengths activate ATP synthase. b. These are the only wavelengths reaching Earth from the sun. c. These are the only wavelengths that carotenoids cannot absorb. d. These wavelengths have the highest energy in the visible spectrum. e. These wavelengths are absorbed by chlorophyll more than any other wavelength.