Which of the following statements describes and interaction between the atmosphere and the biosphere? A. Water and its vapor move through the air.
B. Earth’s internal heat warms the layer of air around it.
C. Oceans provide and environment for sustaining marine life.
D. Life is possible on earth due to the layers of air that surround it.

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

The smallest parts of these that retain their original properties are called