Which of the following is the best evidence (proof) that digestion involves a chemical change? A. The body produces substances that aid in digestion in the mouth (saliva) and stomach (acid)

B. The beginning and end amount are equal

C. Teeth break down food into smaller particles

D. The esophagus uses peristalsis to move the bolus down to the stomach.

What percentage of light hits earth's surface directly?

What will happen if deforestation continue to destroy the green plant on the planet

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a. the offspring are more likely to have freckles. b. the offspring are more likely to have no freckles. c. the likelihood of the offspring having freckles and not having freckles is the same. d. the likelihood of the offspring having freckles and not having freckles cannot be determined.