A lion stores 100 energy units after eating zebra meat from the trophic level below it. How many energy units did the zebra meat have?

The outer layers of human skin are composed of dead cells impregnated with keratin and oil, which make the epidermis relatively impermeable to water, yet humans sweat freely in hot temperatures. This occurs because:

What is photosynthises

Can the gravitational force of Earth do positive or negative work on a geosynchronous communication satellite, once it is on its circular orbit?

Through which duct can pancreatic juice be released into the small intestine without also releasing bile?

Dilated pupils, inhibited digestive activity, increased respiratory rate, and release of glucose from the liver are all signs of activity of

Enhancer i can stimulate the transcription of gene a, but the insulator blocks its effect on gene b. enhancer ii can stimulate the transcription of gene b, but the insulator blocks its effect on gene a.

Anna heated 15 g of Substance A to obtain 5 g of substance B, 4 g of Substance C, and a certain amount of Substance D, which statement is correct A) the mass of substance D was 10g less than the mass of substance A B) the mass of substance D was 1 g

A source from which organisms generally take elements is called a/an A. biotic community. B. exchange pool. C. reservoir. D. food web.

Scientists combine evidence from fossils, body structures, early development, DNA, and protein structures to a. determine what bones an animal has in its forelimbs. b. determine the evolutionary relationships among species. c.

Where is strep found in nature?