Q: What is needed to provide cells with the oxygen they need for cellular respiration? Choices: - vascular tissue - passive transport - photosynthesis - gas exchange A:
gas exchange

(Question)
Q: There are about 50,000 vertebrate species, and they are placed in how many different classes? Choices: - four - ten - three - nine A:
(Answer)
nine

Ques: Q: Rather than being dead, dry, and brittle, what support structures of the human body consist of living tissues and are supplied with blood and nerves? Choices: - lungs - feet - hearts - bones A:
Ans: bones

(Q).
Q: What are the two most common causes of diseases? Choices: - bacteria and protazoa - viruses and protazoa - nutritional deficiencies - bacteria and viruses A:
(A).
bacteria and viruses

Ques:Q: What is the most abundant biochemical compound, making up the cell walls of plants? Choices: - magnesium - cytoplasm - mitochondria - cellulose A:

Ans:cellulose

Ques: Q: What is necessary in a person who wishes to play wind instruments? Choices: - strong hands - vocal cords - powerful lips - healthy lungs A:
Ans:
healthy lungs