Which vitamin deficiency can possibly lead to permanent blindness?

A. vitamin A

B. vitamin B6

C. vitamin C

D. vitamin D

Which region would likely have the greatest amount of biodiversity? OA B. a mountainous region with two ecosystems, each of which supports a few different species a grassland region with one ecosystem, which supports very large populations of a few

The essential nutrients Multiple Choice 1. must be consumed at every meal. 2. are required for infants but not adults. 3. can be made in the body when they are needed. 4. cannot be made by the body and therefore must be consumed to maintain health.

An atom has an atomic number of 17 and an atomic mass 0f 35: How many electrons does this atom have?

Why is climate so much harder to predict than weather?

Galactose is a sugar and follows the ratio of 1:2:1. The chemical formula for galactose is C6H12O__. A. 1 B. 12 C. 6 D. 22

First to answer this gets 70 pts. Which planet do most known extrasolar planets LEAST resemble? A. Jupiter B. Mars C. Neptune D. Uranus

Which object in our solar system has the greatest density

Nearly all of what in your cells comes from your mother

Which system works with the circulatory system to move blood around the body?

How is carbon returned to soil