Q: What human disease is caused by a defective enzyme that is unable to produce melanin, the pigment responsible for the color of skin and hair? Choices: - hemophilia - anemia - mutations - albinism A:
albinism

(Question)
Q: What is the name of the process by which plants use energy from sunlight to synthesize carbohydrates? Choices: - osmosis - cellular respiration - pollination - photosynthesis A:
(Answer)
photosynthesis

Ques: Q: What are reactions that can occur only in one direction called? Choices: - permanent - instantaneous - critical - irreversible A:
Ans: irreversible

(Q).
Q: Aquatic producers need nutrients and what dissolved gas, which is more abundant near the surface of water? Choices: - helium - nitrogen - methane - oxygen A:
(A).
oxygen

Ques:Q: What natural part of the water cycle can cause damage and death? Choices: - clouds - evaporation - expiration - floods A:

Ans:floods

Q: Normal blood is comprised of nearly half erythrocytes, which is another word for what cells? Choices: - monocytes - white blood cells - plateletes - red blood cells A:
red blood cells