1. Bears hibernate during winter, since food is scarce (low) during winter.

If the bears don't find a suitable place to hibernate, they will most likely

die. What is the main reason for bears to die?

Why do some leaves change color (red, yellow, orange, etc.) in the fall? the chlorophyll molecule breaks down and other pigments now become visible. the chlorophyll molecule is modified to absorb different wavelengths of light.

Since oxygen is significantly more electronegative than hydrogen, oxygen atoms have a much stronger attraction to shared electrons than hydrogen atoms have. This unequal sharing of electrons and bent shape results in a polar molecule.

Which one of the following is an example of osmosis? A. Water enters a plant by passing through the root cell membranes. B. Potassium ions enter a red blood cell through the action of a specific ion transport protein. C.

What is the name for a group of individuals of the same species living together in the same area at the same time?

Which organ is part of the cardiorespiratory system? Lungs brain liver kidney question 3?

Fish have what type of circulatory system? A.) single loop B.) double loop C.) triple loop D.) quadruple loop

Which neurotransmitter is released by motor neurons at the neuromuscular junction?

About what fraction of earths fresh water is in the form of ice

Explain the process that creates wind?

Science can only test questions that involve the natural world true or false