How old dose boy's hit puberty

Describe the path of light as it travels from the flashlight to the air.

What are the requirements for photosynthesis to occur, and what is the role of ATP in this reaction 1) water, oxygen and chemical energy are required, and ATP is changed to ADP 2) water, carbon dioxide, and electrical energy are required, and ATP is

What do chordates have that makes them different? A. no body cavities B. a notochord C. under-developed organ systems

What is the relationship between extinction and environmental change?

How do trees know when to shed their leaves

How many atoms is in this formula? 2C12H6O6

Explain the reason that many organisms found in the oceanic zone are unique and cannot be found anywhere else. Be sure to include two ways organisms have adapted to live in this zone

A species of fish is introduced into a lake the fish is better at hunting for food than the old fish. the old fish die off, the new fish population increases. which is the best way to describe these fish in the new ecosystem

Some populations of bats live in areas with high levels of noise pollution, such as near heavily trafficked bridges. How might the hunting behavior of bats be affected by such an environment?

Which best describes the relationship between blood flow and lymph flow? A. Blood flows through the contraction of skeletal muscle, and lymph flows through the contraction of cardiac muscle. B.