Answer the following question given this paragraph: Gas exchange is needed to provide cells with the oxygen they need for cellular respiration. Cells cannot survive for long without oxygen. Gas exchange is also needed to carry away carbon dioxide waste. Some of the carbon dioxide in the blood dissolves to form carbonic acid, which keeps blood pH within a normal range. 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)
Answer the following question given this paragraph: There are about 50,000 vertebrate species, and they are placed in nine different classes. Five of the classes are fish. The other classes are amphibians, reptiles, birds, and mammals. Table below lists some of the distinguishing traits of each class. 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: Answer the following question given this paragraph: Some people think bones are like chalk: dead, dry, and brittle. In reality, bones are very much alive. They consist of living tissues and are supplied with blood and nerves. 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).
Answer the following question given this paragraph: Today most people realize that microorganisms, such as bacteria or viruses, are the cause of disease. This concept is known as the germ theory of disease, one of the few scientific theories in the field of the life sciences. Although it seems obvious now, people did not always understand the cause of disease. How does a theory such as this become established?. 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:Answer the following question given this paragraph: Cellulose is the most abundant biochemical compound. It makes up the cell walls of plants and gives support to trunks and stems. Cellulose also provides needed fiber in the human diet. We can't digest cellulose, but it helps keep food wastes moving through the digestive tract. Q: What is the most abundant biochemical compound, making up the cell walls of plants? Choices: - magnesium - cytoplasm - mitochondria - cellulose A:

Ans:cellulose
Ques: Answer the following question given this paragraph: You don't have to be a musician to know that playing a wind instrument like the trumpet takes a lot of air. Having healthy lungs is necessary to play a trumpet or other wind instrument. The lungs are part of the respiratory system. 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