Q: Where does the stratosphere get most of its heat? Choices: - time - earth - volcanoes - sun A:
sun

(Question)
Q: What are the tiny sacs in the lungs where gas exchange takes place? Choices: - bronchi - ganglion - cilia - alveoli A:
(Answer)
alveoli

Ques: Q: How do some animals change their depth? Choices: - mass migration - metamorphosis - spontaneous mutations - by changing their density A:
Ans: by changing their density

(Q).
Q: In the body, oxygen is used by cells of the body's tissues and carbon dioxide is produced as what? Choices: - oxygen - fuel - food - waste product A:
(A).
waste product

Ques:Q: The name of the cation comes first, followed by the name of the anion, in what kind of compound? Choices: - magnetic compound - localized compound - covalent bonds - ionic compound A:

Ans:ionic compound

Ques: Q: What are the two types of vascular tissues found in vascular plants? Choices: - xylem and chloroplasm - cytoplasm and chloroplasm - ectoderm and phloem - xylem and phloem A:
Ans:
xylem and phloem