Which of the fallowing provides support and protection for many insects

mussels

skeleton

spinal cord

exoskeleton

The intensity of light is more important than leaf surface area for photosynthesis. a. True b. False

If a non-native species is introduced into an ecosystem and it competes for the same ecological niche as a native species, what could be the outcome? The Hawaiian Islands are home to many endangered species.

Potholes may form on the bottom of a stream because of

Identify which questions can be answered through science and which cannot.

The lungs are held to the thorax wall by the smooth muscles of the lungs. True or False

Lesson 16 what is the respiratory system

Whit is the relationship between monomers and a polymer

Which statement about the U. S. Clean Water Act is true?

The United States uses which source of energy to produce almost 40 percent of its electricity? A. solar B. water C. biomass D. wind E. coal

Which cell breaks down carbohydrates