Which example best describes one way that humans contribute to the water cycle?

A. formation of genetic material

B. evaporation of sweat from skin

C. production of oxygen

D. fixation of nitrogen into ammonia

An energy pyramid is shown. Which sentence best describes how energy flows through this pyramid? A) Energy is transferred down each level of the energy pyramid. B) The energy lost at each level is consumed by organisms in the top level.

A whale has a calf and a bacteria replicates through cloning. Both of these are examples of? • Needing energy • Growth & development • maintaining homeostasis • reproduction

Which of the following contributions to the theory of the conservation of energy is an observation of a biological system?

Compare and contrast the species biodiversity of different areas: rainforest, cornfield, vegetable garden, and a tundra by plants and animals.

List two ways that fish can sense prey animals

Identify the moth variant that was selected for during the Industrial Revolution, when pollution began to kill the lichen that previously covered all of the trees.

Products in which titanium is used

If a fly were to land on your face and then on your back, which one might you feel first? How could you test your choice?

What building should represent the nucleus and why

The tundra is characterized by extremely low temperatures as well as little precipitation, a rocky landscape, and permafrost.