Which phrase best describes the time period in which the current body of scientific knowledge was developed?
a. just over the last 50 years
b. throughout all of history
c. mostly during roman times
d. mostly in the 20th century

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

For each of the following, decide whether the statement describes photosynthesis, cellular respiration, or both. releases energy in the form of atp. stores energy in glucose molecules. performed by producers. performed by consumers.

When water freezes, it . contracts expands