How does sexual reproduction increases variation within species ?
A) by increasing the rate at which parents can produce offspring
B) by reducing the amount of time it takes parents to produce offspring
C) by causing offspring to have the same exact DNA as their parents
D) by producing offspring that are genetically different from their parents

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?