Ques: Q: Human blood has a buffering system to minimize extreme changes in what? Choices: - sodium level - calcium - ions - ph A:
Ans: ph

Ques: Q: What is the largest and most complex algae Choices: - open algae - green algae - strange algae - brown algae A:
Ans: brown algae

Ques: Q: Algae are like plants mainly because they contain what? Choices: - organelles - cells - cell wall - chloroplasts A:
Ans: chloroplasts

Ques: Q: What is the period during which humans become sexually mature called? Choices: - adulthood - maturity - adolescence - puberty A:
Ans:
puberty