Which of the following is one observation that charles darwin made regarding variation?
a. organisms are born with variation.
b. organisms are not born with variation.
c. variation is not observable in nature today.
d. variation is acquired as organisms go through daily life.

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas

Which organism can most likely be classifild as domain bateria