Q: What do ecosystems require constant inputs of? Choices: - Water - fuel - heating - energy A:
energy

(Question)
Q: Eukaryotic cells undergo what kinds of divisions that more primitive cells do not? Choices: - budding - meiosis - homologous - mitosis A:
(Answer)
mitosis

Ques: Q: Science is a process of knowing about the natural universe through what two actions? Choices: - thinking and guessing - changes and experimentation - guessing and observing - observation and experimentation A:
Ans: observation and experimentation

(Q).
Q: Roundworms feed on various things, one of them being decaying organic matter. doing this, they play an important role in what famous cycle? Choices: - life cycle - soul cycle - water cycle - carbon cycle A:
(A).
carbon cycle

Ques:Q: What begins approximately six weeks after fertilization in an embryo? Choices: - calcification - elongation - incubation - ossification A:

Ans:ossification

Q: The entry of acidic chyme into the duodenum stimulates the release of what? Choices: - progesterone - gastrin - oxygen - secretin A:
secretin