Q: What is the star-like structure inside the paramecia? Choices: - the reflex vacuole - the elongated vacuole - the bare vacuole - the contractile vacuole A:
the contractile vacuole

(Question)
Q: What's the most common disorder from having an extra chromosome? Choices: - Williams syndrome - Turner syndrome - cri-du-chat syndrome - down syndrome A:
(Answer)
down syndrome

Ques: Q: What are natural resources which can be replaced in a relatively short period called? Choices: - solvent resources - materials resources - replaceable resources - renewable resources A:
Ans: renewable resources

(Q).
Q: What is the first digestive organ that food enters? Choices: - intestine - digestive system - kidneys - mouth A:
(A).
mouth

Ques:Q: What branch of science deals with the effects people have on the environment? Choices: - physical science - cultural science - ecological science - environmental science A:

Ans:environmental science

Q: Although air can transfer heat rapidly by convection, it is a poor conductor and thus a good what? Choices: - magnet - absorber - transporter - insulator A:
insulator