Answer the following question given this paragraph: Figure 40.10 The mammalian circulatory system is divided into three circuits: the systemic circuit, the pulmonary circuit, and the coronary circuit. Blood is pumped from veins of the systemic circuit into the right atrium of the heart, then into the right ventricle. Blood then enters the pulmonary circuit, and is oxygenated by the lungs. From the pulmonary circuit, blood re-enters the heart through the left atrium. From the left ventricle, blood re-enters the systemic circuit through the aorta and is distributed to the rest of the body. The coronary circuit, which provides blood to the heart, is not shown. Q: What part of the heart receives the blood is pumped from veins of the systemic circuit? Choices: - left atrium - left ventricle - right ventricle - right atrium A:
right atrium
(Question)
Answer the following question given this paragraph: Acid rain is rain that has a pH less than 5 (see Figure below ). The pH of normal rain is 5.6. It's slightly acidic because carbon dioxide in the air dissolves in rain. This forms carbonic acid, a weak acid. Q: What is the term for rain that has a ph less than 5, due to carbon dioxide dissolving? Choices: - frozen rain - basic rain - carbon rain - acid rain A:
(Answer)
acid rain
Ques: Answer the following question given this paragraph: Stratus clouds occur low in the troposphere. They form in layers that spread horizontally and may cover the entire sky like a thick blanket. Stratus clouds that produce precipitation are called nimbostratus. The prefix nimbo- means "rain. ". Q: Where do stratus clouds occur in the troposphere? Choices: - mid to high region - high - mid-region - low A:
Ans: low
(Q).
Answer the following question given this paragraph: and . The electric force is 39 orders of magnitudes bigger. Q: How many orders of magnitudes bigger is the electric force? Choices: - 36 - 45 - 33 - 39 A:
(A).
39
Ques:Answer the following question given this paragraph: Insects have six legs and a pair of antennae for sensing chemicals. They also have several eyes and specialized mouthparts for feeding. Q: Insect's antennae are useful for sensing what? Choices: - contaminants - microorganisms - sunlight - chemicals A:

Ans:chemicals
Answer the following question given this paragraph: Chemical digestion could not take place without the help of digestive enzymes and other substances secreted into the GI tract. An enzyme is a protein that speeds up a biochemical reaction. Digestive enzymes speed up the reactions of chemical digestion. Table below lists a few digestive enzymes, the organs that produce them, and their functions in digestion. Q: What speeds up the reactions of chemical digestion? Choices: - protein catalysts - electrical enzymes - stomach acids - digestive enzymes A:
digestive enzymes