The flow of energy through an ecosystem always begins with what types of organisms?

Which of the following best compares the factors affecting blood flow that directly cause heart attack and stroke?

What two systems combine to make up the nervous system as a whole?

What is the use of plants for humans

What are two ways in which all living things are similar at the molecular level.

You are monitoring a quantitative trait in a population of butterflies over multiple generations. Your professor tells you that the trait is evolving by natural selection in this population. However, there is no change in mean fitness over time.

Methane hydrates in the ocean are a significant source of methane

Describe what makes up the universe.

The measure of the force with which air molecules push on a surface is called a

Plants get their energy from OA. the Sun OB. rocks OC. the wind OD. the soil

The cycle is not a nutrient cycle