Answer:
But certain stressors, most of them human-caused or human-influenced, threaten or reduce biodiversity. Because the creatures and plants in ecosystems are interdependent, the loss of even one species can have profound effects on the entire ecosystem, can affect other ecosystems and can endanger people as well.
Answer: D (It involves carrier-mediated transport).
Explanation:
Tubular reabsorption transports nutrients back into the blood. Tubular reabsorption of nutrients such as sodium, glucose, lactate amino acids, and other organic substances occurs via carrier membrane proteins to the proximal tubule.
Most of the substances that are reabsorbed via the proximal tubule require the use of carrier membrane proteins, for facilitated diffusion, active transport and secondary active transport.
Example of secondary active transport is the sodium-dependent glucose cotranspoter.
Answer:
Energy flows directionally through Earth’s ecosystems, typically entering in the form of sunlight and exiting in the form of heat. However, the chemical components that make up living organisms are different: they get recycled.
What does that mean? For one thing, the atoms in your body are not brand new. Instead, they've been cycling through the biosphere for a long, long time, and they've been part of many organisms and nonliving compounds along the way. You may or may not believe in reincarnation as a spiritual concept, but there's no question that atoms in your body have been part of a huge number of living and nonliving things over the course of time!
Explanation:
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The protein and enzyme complex that is important in controlling the cell cycle three of the processes it controls is the <span>cyclin and cyclin dependent kinases.
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