Q: What is the radula made mostly of? Choices: - casein - chlorophyll - schist - chitin A:
chitin

Q: What is the study of matter and the changes that material substances undergo. Choices: - physiology - biology - geology - chemistry A:
chemistry

Q: Q: What term means a failure, insufficiency, or delay in the response of the immune system, which may be acquired or inherited? Choices: - anemia - pathogenic - vitamin deficiency - immunodeficiency A:
A: immunodeficiency

Question: Q: A change in the sequence of bases in dna or rna is called a what? Choices: - infection - isolation - accumulation - mutation A:
Answer: mutation

*Question*
Q: What is the most common type of cancer developed in children? Choices: - anemia - lung cancer - stomach cancer - leukemia A:
**Answer**
leukemia

*Question*
Q: When boron10 absorbs a neutron, what does it emit? Choices: - calcium - light - proteins - particle A:
**Answer**
particle