In a balanced ecosystem, the number of consumer is?

Explain why Aristotle's system of classifying animals is no longer used by biologists? Use examples from the animal kingdom to support your answer.

What a pancreas used for

What is the type of chemical reaction used to rebuild ADP into ATP? a) hydrolysis b) dehydration synthesis c) rehydration synthesis

What were the conditions on earth billions of years ago

The daughter-producing sperm used to fertilize brittany's eggs should be

Which of the following would be an individual effort to reduce air pollution? the Clean Air Act of 1970 building a carpool lane on the freeway riding a bike instead of driving a car burning wood in a fireplace

Thyroid-stimulating hormone stimulates the thyroid gland to secrete sex hormones. True or False?

Explain the genotypes and phenotypes of skin color. summarize the relationship between the number of active genes and color of the skin.

An example of a communicable disease is: a. cancer b. chronic respiratory disease c. diabetes d. giardiasis

Describe what are the basic needs of all cells in the body