Which best explains how the human body obtains energy from food?
O
O
A. By inhaling oxygen into the lungs
B. By exhaling carbon dioxide
C. By removing dangerous wastes
D. By breaking and reforming chemical bonds
O
O

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

Nerve cells are specialized to respond to stimulitrue or false?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi