Tanya is on the high school track team and runs the 100-meter sprint. Marissa is on the cross-country team

and runs 5-kilometer races. Explain which type of respiration the muscle cells in each runner's legs use.

Competitive exclusion is most likely to occur between two (A) closely related species occupying different niches (B) closely related species occupying the same niche (C) related species occupying different habitats (D) unrelated species occupying

The deepest place in the seafloor is called the

This system transports blood through the body and heart.

In your opinion which type of source will be most common in the future choose the following explain why 1) coal 2) oil 3) natural gas

Which of the following is an example of homeostasis in animals? A. A beaver builds a dam. B. An insect sheds its exoskeleton. C. A dog pants after running in the park. D. A grouse fans its tail and inflates its air sac.

Which of the following are the building blocks of protein a. monosaccharides b. amino acids c. RNA d. starches

Forest wildlife survive best in forest that are A. Of mix-age trees. B. Deciduous. C. Evergreen. D. Of even-age trees.

Primary succession occurs A. After a disturbance that removes an entire community leaving a sterile environment B. After a disturbance that disrupts a community but leaves a seed bank in the soil C. Right before the secondary succession D.

Evaluate the use of stem cells from embryos

Do stomata open when there is an abundance of water during the daytime or nighttime?