Where does the primary source of energy needed for life come from?
1) solar energy
2) geothermal energy
3) nuclear energy
4) kinetic energy

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

What maintain homeostasis when a persons internal body temperature is 97.5°f