Answer the following question given this paragraph: Many organisms reproduce sexually. In sexual reproduction, parents of different sexes mate to produce offspring. The offspring have some combination of the traits of the two parents. Ducks are examples of sexually reproducing organisms. Other organisms reproduce asexually. In asexual reproduction, a single parent can produce offspring alone. For example, a bacterial cell reproduces by dividing into two daughter cells. The daughter cells are identical to each other and to the parent cell. Q: In what type of reproduction do parents of different sexes mate to produce offspring? Choices: - subject reproduction - parallel reproduction - dual reproduction - sexual reproduction A:
sexual reproduction
Answer the following question given this paragraph: We can see rainbows because they are formed by visible light. Visible light includes all the wavelengths of light that the human eye can detect. It allows us to see objects in the world around us. Without visible light, we would only be able to sense most objects by sound or touch, and we would never see rainbows. Like humans, most other organisms also depend on visible light, either directly or indirectly. Many animals use it to see. All plants use it to make food in the process of photosynthesis. Without the food made by plants, most other organisms could not survive. Q: What helps us see rainbows in the sky? Choices: - spectral light - myopia - prism - visible light A:
visible light
Q: Answer the following question given this paragraph: The nitrogen cycle includes air, soil, and living things. Q: The nitrogen cycle includes air, soil, and what? Choices: - water - decomposers - heat - living things A:
A: living things
Question: Answer the following question given this paragraph: The small intestine is a narrow tube that starts at the stomach and ends at the large intestine. In adults, it's about 7 meters (23 feet) long. Most chemical digestion and almost all nutrient absorption take place in the small intestine. Q: What is the name of the narrow tube that begins at the stomach and ends at the large intestine? Choices: - small stomach - pancreas - small tissues - small intestine A:
Answer: small intestine
*Question*
Answer the following question given this paragraph: Now consider what observer B sees happen to observer A. Observer B perceives light from the right reaching observer A before light from the left, because she has moved towards that flash lamp, lessening the distance the light must travel and reducing the time it takes to get to her. Light travels at speed c relative to both observers, but observer B remains equidistant between the points where the flashes were emitted, while A gets closer to the emission point on the right. From observer B's point of view, then, there is a time interval between the arrival of the flashes to observer A. From observer B's point of view, then, there is a time interval between the arrival of the flashes to observer A. In observer A's frame of reference, the flashes occur at different times. Observer B measures the flashes to arrive simultaneously relative to him but not relative to A. Now consider what observer A sees happening. She sees the light from the right arriving before light from the left. Since both lamps are the same distance from her in her reference frame, from her perspective, the right flash occurred before the left flash. Here a relative velocity between observers affects whether two events are observed to be simultaneous. Simultaneity is not absolute This illustrates the power of clear thinking. We might have guessed incorrectly that if light is emitted simultaneously, then two observers halfway between the sources would see the flashes simultaneously. But careful analysis shows this not to be the case. Einstein was brilliant at this type of thought experiment (in German, "Gedankenexperiment"). He very carefully considered how an observation is made and disregarded what might seem obvious. The validity of thought experiments, of course, is determined by actual observation. The genius of Einstein is evidenced by the fact that experiments have repeatedly confirmed his theory of relativity. In summary: Two events are defined to be simultaneous if an observer measures them as occurring at the same time (such as by... Q: The validity of thought experiments, of course, is determined by this? Choices: - predictive observation - theoretical observation - hypothetical observation - actual observation A:
**Answer**
actual observation
*Question*
Answer the following question given this paragraph: Q: Liquid water changing to water vapor is called? Choices: - oxidation - respiration - transpiration - evaporation A:
**Answer**
evaporation