When a substance changes into a different substance,

change has occurred.

O chemical

Life

Today

O color

O phase

Tomorrow

physical

ules

Tomorrow

What is the major cause of the greenhouse effect? view available hint (s) what is the major cause of the greenhouse effect?

Describe the feeding relationship among the organisms in the food chain

Which condition is a biotic factor of an aquarium ecosystem? O amount of oxygen in the water temperature of the water O algae growing on the glass O gravel on the bottom of the aquarium

What is passive transport? distinguish between diffusion, osmosis, and facilitated diffusion.

What is that burning-warm feeling you feel when hold your breath

DNA encodes the information necessary to produce the proteins needed by your body. While this is true for humans, is it the case for other organisms? A) No, humans are the only species to use DNA.

Why is the symbol X avoided in algebra?

What are two ways excess nitrogen is added to the nitrogen cycle

Examples of autoimmune disease are _ a Flu, rheumatoid arthritis and Type I diabetes b Type I diabetes, rheumatoid arthritis and influenza c Lupus, rheumatoid arthritis and Type I diabetes d Type I diabetes, malaria and lupus

In order to grow, all organisms must