Why tropical rainforests are among the productive terrestrial ecosystem while tundra and desert ecosystems are among the last productive

Does masterbation affect height growth or loss of growth hormone?

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle