(Q).
Q: What kind of compounds change color when bases come into contact with them, so they can be used to detect bases? Choices: - liquid - parameters - metals - indicators A:
(A).
indicators

(Q).
Q: Eggs reside in the mesohyl, but sperm are carried out of the sponge by what? Choices: - air current - phloem - ion channels - water current A:
(A).
water current

(Q).
Q: Abrasion is a process of what type of weathering? Choices: - geological - molecular - environmental - mechanical A:
(A).
mechanical