Which part of the cell is the organelle that functions as its brain?
the dna
the nucleus
the cytoplasm
the tissue

Which two levels of the spine that can undergo flexion and extension?

John is jogging on a winter day. the outdoor temperature is 31° f. yet his body temperature is 98°f. which term best describes the process causing this difference in temperature?

Which of the following is not a fitness benefit of cycling a: very effective at burning fat b: provides an upper body workout c: provides an aerobic workout d: good exercise for out of shape people