Which of the below is evidence that photosynthesis is a chemical change? There is a change in shape of plant leaves.

New solids and gases are formed, including sugar and oxygen.

There is a change in the state of matter because water evaporates.

(This is 7th grade science) please please help

Anurse is administering a drug that blocks the protease enzyme so new viral particles cannot mature. which category of drugs is the nurse most likely administering

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion