A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Dichotomous keys always give two choices in each step.
Answer:
Aim to be at your THR for at least 15 to 20 minutes workout time, and ideally 35 to 45 minutes. If you're a beginner, start at 65 percent to 70 percent of your maximum heart rate and gradually increase the intensity.
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Answer:
Less energy is available to the upper trophic levels.
Answer:
c. Active transport
Explanation:
The differences between the different type of a substance's movement through a membrane (phospholipid bilayer) are:
<u>- Passive transport:</u> is the movement of substances across the membrane without needing ATP energy. Encompass facilitated diffusion and osmosis.
<em>Facilitated diffusion:</em> requires a transmembrane protein but the substances move in favor of their concentration gradient (this process doesn't need ATP energy).
<em>Osmosis:</em> when the molecules are not polar they can diffuse through the membrane, as long as they move in favor of their concentration gradient. So this process doesn't need transport proteins neither ATP.
<u>- Active transport:</u> polar molecules or ions require both a transmembrane transport protein and ATP energy when they move from a region of lower concentration to a one higher concentration, meaning, against the concentration gradient.