The role of a catalyst in a chemical reaction is to A. be non-specific enough to work in any reaction.
B. increase the amount of energy required for the reaction to occur.
C. enter into the reactants to change the product.
D. lower the activation energy and speed up the reaction.

it would be the percentage of food eaten by the flock

i remember doing this lab

i do not know and i have a 100 in this class

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.