Answer: D. Hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
Hypothesis A and B both are suggesting that caffeine intake is related to higher heart rate. But hypothesis B is proving it more certainly by suggesting the affects of caffeine intake on heart rate. As, heart rate of most people will be higher 30 minutes after they drink a cup of coffee is testifying the fact, that higher heart rate is related with caffeine intake.
Therefore, hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
Answer:
radiant energy to chemical energy
EXPLANATION:
sunlight is ntg but radiation, it falls on leaf and through the process of photosynthesis it converts radiant energy to chemical energy
Answer:
evolution is random
Explanation:
there is no explination for evolution over time things find there own way to be better
Tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys<span> consist of a series of choices that lead the user to the correct name of a given item. "</span>Dichotomous<span>" means "divided into two parts".</span>
One disadvantage I can think of would be pathogen. This is <span>parasites, bacteria, and viruses that cause diseases in living things. I hope this helps, hun! :)</span>