Q: What type of bonds between the bases at the center of the dna double helix hold the helix together? Read this paragraph and choose the correct option from the provided answers: DNA's three-dimensional structure is a double helix. The hydrogen bonds between the bases at the center of the helix hold the helix together. Choices: - helium bonds - ionic bonds - electron bonds - hydrogen bonds A:
hydrogen bonds

(Question)
Q: A circuit must be what in order for electric devices such as light bulbs to work? Read this paragraph and choose the correct option from the provided answers: A circuit must be closed for electric devices such as light bulbs to work. The arrows in the diagram show the direction in which electrons flow through the circuit. The current is considered to flow in the opposite direction. Choices: - open - down - cyclical - closed A:
(Answer)
closed

Ques: Q: Different elements differ in the size, mass, and other properties of what fundamental structures? Read this paragraph and choose the correct option from the provided answers: Atoms of different elements differ in size, mass, and other properties. Choices: - ions - compounds - particles - atoms A:
Ans: atoms

(Q).
Q: How can bacterial stis usually be cured? Read this paragraph and choose the correct option from the provided answers: A number of STIs are caused by bacteria. Bacterial STIs can usually be cured with antibiotics. However, some people with bacterial STIs may not have symptoms so they fail to get treatment. Left untreated, these infections may damage reproductive organs and lead to an inability to have children. Choices: - tylenol - antiinflammatories - antivirals - with antibiotics A:
(A).
with antibiotics

Ques:Q: A change in temperature with distance is called a what? Read this paragraph and choose the correct option from the provided answers: Air temperature changes with altitude. This does not occur in the same way as pressure and density, which decrease with altitude. Changes in air temperature are not regular. A change in temperature with distance is called a temperature gradient . Choices: - oxygen gradient - speed gradient - solution gradient - temperature gradient A:

Ans:temperature gradient

Question: Q: What is approximately the average stroke volume in humans? Read this paragraph and choose the correct option from the provided answers: Choices: - 80 ml - 65 ml - 75 ml - 70 ml A:
Answer:
70 ml