3. The sun is primarily composed of which two elements?

a. hydrogen and helium

b. helium and carbon

c. carbon and iron

d. hydrogen and water

2. True or False Ice is less than dense than water.

What type of cells can be found in both multicellular and single celled organisms

Channel proteins and carrier proteins are both a type of transport protein. t or f

Where are active volcanoes located?

Why are fats useful and sometimes better than carbohydrates

The lowest level of environmental complexity that includes both living and nonliving factors is the A: Biome B: Community C: Ecosystem D: Biosphere

Which part of the endocrine system is located in the middle of the brain

Suppose a tropical storm hit your local coastal areas. Residents noticed a large amount of dead fish washed up on the beach following the storm. What physical factors of the aquatic ecosystem may have caused the fish die off?

A scientist describe to study the effect of salt on a particular type of bacteria. Arrange the steps Of the scientific method in the correct order to show how the scientist would proceed with his work

How is a new species or group of species represented in the scientist's model?