Answer:
cell Parts Analogy. The cell membrane controls what goes in and out of the cell. The cell membrane is like a screen door, because a screen door holds things out but lets air in.
Gradient = difference in elevation/horizontal distance
Answer:
i think #4 is correct i hope this helps
Explanation:
Answer:
Animals and humans depend on plants for many things, and without plants, there could be no life on Earth.
Explanation:
1. Plants are the primary producers. They are the only organisms that can make their own food. Animals, who are incapable of making their own food, depend on plants for their supply of food.
2.The oxygen that animals breathe comes from plants. Through photosynthesis, plants take energy from the sun, carbon dioxide from the air, and water and minerals from the soil. They then give off water and oxygen. Animals then use oxygen process called respiration. Respiration is the process used by organisms to release energy from food, and carbon dioxide is given off.
3.Plants also provide habitat for many species of animals. The plants provide food, shelter from weather (rain, sun), nesting place, sleeping ground and hideout from predators.
For example: Different animals live in different parts of the rainforest. Scientists divide the rainforest into zones based on the living environment.
During an earthquake, geologists use a machine called a SEISMOGRAPH to study seismic waves.
P waves can pass through both solid and molten rock, but S waves can pass only through SOLID rock.
