(Q).
Q: The common cold and flu are examples of human diseases caused by what tiny particles? Choices: - infections - parasites - bacteria - viruses A:
(A).
viruses

(Q).
Q: When cats mark their territory by rubbing their face against an object, they deposit chemicals released by what structures? Choices: - whiskers - pituitary glands - taste buds - scent glands A:
(A).
scent glands

(Q).
Q: Skeletal muscles are attached to bones by what? Choices: - plasma - enzymes - veins - tendons A:
(A).
tendons