If a mouse eats grass, a snake eats the mouse, and an eagle eats the snake, what is the eagle ?
a. producer.
b. secondary consumer.
c. primary consumer.
d. tertiary consumer.

What are the three types of counseling established by marine corps policy?

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution