Q: What man-made substance tends to break down ozone in the stratosphere? Choices: - gasoline - steel - plastic - cfcs A:
cfcs

(Question)
Q: What charge do atoms carry? Choices: - negative - static - positive - neutral A:
(Answer)
neutral

Ques: Q: The dead, dry stratum corneum is the most superficial layer of what and is the layer exposed to the outside environment? Choices: - intestinal - lungs - dermis - epidermis A:
Ans: epidermis

(Q).
Q: What branch of science is the study of matter and energy? Choices: - unnatural science - natural science - negative science - physical science A:
(A).
physical science

Ques:Q: Sea-lilies, sea cucumbers and sea stars fall into what class of organism? Choices: - snakes - mollusks - crabs - echinoderms A:

Ans:echinoderms

Ques: Q: What is the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane? Choices: - metastasis - autolysis - ectocytosis - endocytosis A:
Ans:
endocytosis