Which vitamin can be toxic in excess and increase the risk of birth defects?

Which foods would not make a complement of 20 amino acids, to make a complete protein? a. Corn and beans b. Brown rice and peas c. Peanut butter and white bread d. Yogurt and walnuts

How is water purified/treated?

The vacuole is most like a wall. water balloon. solar panel. conveyor belt.

A botanist has the juiciest tomatoes in his backyard garden. what is true about these tomatoes

23. Which of the following is a seed-producing plant? A. protozoans B. mushroom C. lichen on rocks D. moss with sporophyte stalk E. maple tree

The major cause of air pollution is: a. industrial waste b. sewage and pesticides c. car exhaust d. radioactive waste

What effect would there be on the final daughter cell if the spindle fibers failed to pull a chromosome toward the pole, as in case of non-Disjunction?

We summarize natural selection as "survival fittest". what factor "selects" the fittest organisms in natural selection?

Hypothesis may arise from what

What kind of dna replication error will result in changing an amino acid codon to a stop codon?