Some organisms have traits that them survive in certain situations, while others of the same species do not. these differences happen by due to genetic variation through sexual reproduction.
chance

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

The krebs cycle is also known as the calvin cycle pyruvic acid cycle carbon - oxygen cycle citric acid cycle

Agriculture is changing the environment. with increased populations, there is a greater demand for food. which of the following is not an impact of farming? a) pesticide and fertilizer pollution b) sediment transport and deposition downstream c) increased water supply and flooding d) desertification and deforestation