The combined portions of earth in which all living things exist is called the

How does a rain shadow affect the weather?

A student feels stress and anxiety after seeing a traffic accident. Immediately, an increased heart rate and extra energy with the release of adrenaline is felt. Which of the following systems of the body are working together? A.

What is formed by the mixing of salty sea water and fresh river water

Why does a cork have low density?

What do we call a change in the environment that causes an organism to take action? A. growth B. genetics C. response D. stimulus

Antarctica is covered in ice. which of the following would you expect to be true of Antarctica? A. The ice is immune to insolation B. The ice has no heat capacity C. The ice has a high albedo D. The ice reflects no radiation

Mateo eats his breakfast and his gi tract will now begin the process of digesting and absorbing the nutrients from this meal. what is the order in which each of the organs of the gi tract will work to achieve this process?

Diffusion is the spontaneous movement of a substance from an area of what

Which type of mutation always creates a stop codon?

What is the main mechanism for regulating hormone secretion?