What are the functions of plant stems? (Select all that apply.) support leaves
position leaves toward the sun
absorb water
transport food and water
produce food

answer: blah

explanation:

bc blah

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

true                                                                                                       true true true true true true