A food chain consists of grass, cows, and humans. If the grass

field produces 86,000 kJm-2 year-1 of energy and the cows

contain 18,700 kJm-2 year-1 of energy then what is the trophic

efficiency?

A: 5%

B: 78%

C: 22%

D: 33%

The process in which cells from two different parents unite to produce the first cell of a new organism is called?

Glucagon secretion is stimulated when blood glucose concentration decreases. which carbohydrate pathways does glucagon stimulate in liver?

Cells lining the trachea have whiplike motile extensions on their free surfaces. what are these extensions, what is their source, and what is their function?

The fossil record indicates that the first organisms to appear on earth was

Meeting present needs while still maintaining resources for future needs is known as

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.

What do scientists call an orderly pattern of change over time? A. homeostasis B. ecological succession C. food web D. an ecosystem

When erosion occurs here in Southeast Michigan, what layers are eroded away first?

Which structures regulate water loss and gas exchange in the leaves of plants

Name an organism in each domain: archaea, bacteria, eukarya