Match the following circulatory systems with the correct animals.

1. closed circulatory system

2. two-chambered heart

3. four-chambered heart

a) fish b) earthworm c) birds

This map uses red arrows to show the direction and magnitude of tectonic plate movement. Predict which major plate will move the most over the next 500 years

Which type of pollution is believed to have the most impact on an ecosystem? Select one from the choices given: disease. volcanic eruptions. floods. chemical spills

Is the Mastic (Pistacia lentiscus) tree a monocot or dicot?

What is the envelope of gas that surrounds Earth?

Name three disaccharides

What is a cell how does it effect the body

A farmer crossed a yellow maize plant (Yy) with another yellow maize plant (YY). He planted 200 seeds from this cross. How many of the plants would be yellow?

How do the methods of scientists lead to knowledge?

Actions you do without thinking about them

Joe begins to experience mood swings and disturbed thirst and hunger. Imaging studies indicate that a brain tumor is the likely cause of these disorders. In what part of the brain is the tumor most likely located?