A person with appendicitis will most often present with pain in the

Originally a marine species, stickleback fish now live in both marine and freshwater environments. Marine sticklebacks have pelvic spines that protect them from marine predators.

What kind of molecule carries the alleles from parent to offspring DNA tRNA protein mRNA

Approximately how many different genes can be found in a human cell? A. less than ten B. more than a million C. more than one thousand D. less than one hundred

Describe what might happen to the organisms in a desert if the climate changed and rainfall increased.

Students ask if convection currents are strong enough to move heavy objects. They use a fish tank and a toy boat that floats. Then they place the boat in the tank and watch it for 10 minutes. It doesn't move.

What is sustainable use and how can it benefit the supply of resources?

Which of the following is an enzyme? lactose adenosine protease phosphate

A biologist is studying the possible role of earthworms on the fertility of farm soils. As part of this research, the number of earthworms per acre of farmland is being estimated.

How do cells differentiate from each other? What sends a cell the message to become one kind of cell rather than another type?

7. Both slicing an apple and a chemical change such as cooking an egg cannot be reversed. However, why is slicing an apple still considered only a physical change?