What is “structure is a stock that supports a single flower” please answer ASAP

Nucleic acid certain protein cell membranes certain carbohydrates

Describe two recent or ongoing space missions.

Matthew decided he wanted to hike up mount everest. on his way to the top, it began to snow and the temperature dropped to -10°f. matthew forgot to wear a heavy jacket so his body began to shiver beyond control. in this case, matthew's body shivering is the to a drop in temperature. * 0 points reflex stimuli responce environmental facto