The brain and spinal cord are part of what system?

1.) respiratory system

2.) Central nervous system

3.) all of the answer choices are correct

4.) peripheral nervous system

What is the urine-making, or functional, unit of the kidney?

The compass has changed over the years, finally into what is called a Global Positioning System (GPS). The GPS is a machine that is simple to use and gives a lot of information on your position.

How are humans the carbon cycle and global warming connected

What is the function of the pigment molecules in a light-harvesting complex in the thylakoid membranes?

Which carbohydrate can be used by the body as an immediate source of energy?

How does the amount of uranium in zircon tell us how old the crystal is?

Which organism's are omnivores? A) The snake, the bear, and the fish B) The fish and the eagle C) The bear and the fish D) The snake and the mouse If an omnivore is an animal that eats both plants and animals, I'd choose D because all the other

How are all humans similar?

Why does earth have such a diversity of plant and animal life? give three reasons.

After sequencing a molecule of dna, you discover that 20% of the bases are cytosine. what percentage of the bases would you expect to be thymine? explain why.