Answer the following question given this paragraph: Further away from the heart, the aorta branches into smaller arteries, which eventually branch into capillaries. Capillaries are the smallest type of blood vessel; they connect very small arteries and veins. Gases and other substances are exchanged between cells and the blood across the very thin walls of capillaries. Q: What are the smallest type of blood vessel? Choices: - varicose veins - spider veins - arteries - capillaries A:
capillaries
(Question)
Answer the following question given this paragraph: Arachnids have four pairs of legs, specialized appendages, and a fused head and thorax. Q: How many pairs of legs do arachnids have? Choices: - 8 - 6 - ten - 4 A:
(Answer)
4
Ques: Answer the following question given this paragraph: The Sun is Earth's main source of energy. The Sun gives us both light and heat. The Sun changes hydrogen into helium through nuclear fusion. This releases huge amounts of energy. The energy travels to Earth mostly as visible light. The energy is carried through the empty space by radiation . We can use sunlight as an energy resource, called solar energy. Q: What celestial body is the earth's main source of energy? Choices: - rivers - ocean - moon - sun A:
Ans: sun
(Q).
Answer the following question given this paragraph: Mutagenesis may occur spontaneously or be induced. A spontaneous mutation can just happen. These mutations are not caused by an environmental factor, but occur during normal cellular processes. A spontaneous mutation may be due to a mistake during DNA replication or transcription. Mutations may also occur during mitosis and meiosis. A mutation caused by an environmental factor, or mutagen , is known as an induced mutation . Typical mutagens include chemicals, like those inhaled while smoking, and radiation, such as X-rays, ultraviolet light, and nuclear radiation. Table below lists some spontaneous mutations that are common. Q: Induced mutations are caused by environmental factors. what term is used to describe a mutation that has no environmental cause? Choices: - cancerous mutation - evident mutation - numerous mutation - spontaneous mutation A:
(A).
spontaneous mutation
Ques:Answer the following question given this paragraph: The attractive force between water molecules is a dipole interaction. The hydrogen atoms are bound to the highly electronegative oxygen atom (which also possesses two lone pair sets of electrons, making for a very polar bond. The partially positive hydrogen atom of one molecule is then attracted to the oxygen atom of a nearby water molecule (see Figure below ). Q: The attractive force between water molecules is what kind of reaction? Choices: - symmetrical reaction - aquatic reaction - diffusion reaction - dipole reaction A:

Ans:dipole reaction
Answer the following question given this paragraph: CFCs break down ozone in the stratosphere. Q: What man-made substance tends to break down ozone in the stratosphere? Choices: - gasoline - steel - plastic - cfcs A:
cfcs