Scientists are entirely sure how exactly comets ended up in the oort cloud and kuiper belt.
true or false

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

Which is the function of the hypothalamus in thermoregulation? answers: -sensor -effector -stimulus -intergrating center it's either a or c i believe

Wich level of organization includes all the other levels or organizations