Answer the following question given this paragraph: 34.1 | Digestive Systems By the end of this section, you will be able to: Explain the processes of digestion and absorption Compare and contrast different types of digestive systems Explain the specialized functions of the organs involved in processing food in the body Describe the ways in which organs work together to digest food and absorb nutrients Animals obtain their nutrition from the consumption of other organisms. Depending on their diet, animals can be classified into the following categories: plant eaters (herbivores), meat eaters (carnivores), and those that eat both plants and animals (omnivores). The nutrients and macromolecules present in food are not immediately accessible to the cells. There are a number of processes that modify food within the animal body in order to make the nutrients and organic molecules accessible for cellular function. As animals evolved in complexity of form and function, their digestive systems have also evolved to accommodate their various dietary needs. Q: Animals that have feeding patterns that are somewhere between that of herbivores and carnivores can be called what? Choices: - insectivores - nematodes - megavores - omnivores A:
omnivores
Answer the following question given this paragraph: Besides entertaining a cat, laser light has many other uses. It is used to scan bar codes, for example, and to carry communication signals in optical fibers. Optical fibers are extremely thin glass tubes that are used to guide laser light (see Figure below ). Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optic fiber at the same time, as you can see in Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Q: What do optical fibres look like? Choices: - square boxes - big flashlights - flat paper - thin glass tubes A:
thin glass tubes
Q: Answer the following question given this paragraph: The water cycle includes the ocean, atmosphere, ground, and living things. During the water cycle, water keeps changing state by processes such as evaporation, transpiration, condensation, and precipitation. Q: Precipitation, evaporation, transpiration, and condensation are part of what cycle? Choices: - life cycle - air cycle - cold cycle - water cycle A:
A: water cycle
Question: Answer the following question given this paragraph: Natural events, like storms, volcanic eruptions and earthquakes can cause major changes in water quality. But human-caused contaminants have a much greater impact on the quality of the water supply. Water is considered polluted either when it does not support a human use, like clean drinking water, or a use for other animals and plants. The overgrowth of algae, known as an algal bloom , can result from the runoff of fertilizer into bodies of water. This excess of nutrients allows the algae to grow beyond control, bring harm to the rest of the ecosystem. Q: What has a bigger impact on water quality, natural events or human activity? Choices: - water quality - all of the above - natural events - human activity A:
Answer: human activity
*Question*
Answer the following question given this paragraph: Muscles can only contract. They can't actively lengthen. Therefore, to move bones back and forth at a joint, skeletal muscles must work in pairs. For example, the bicep and triceps muscles of the upper arm work as a pair. You can see how this pair of muscles works in Figure below . When the bicep muscle contracts, it bends the arm at the elbow. When the triceps muscle contracts, it straightens the arm. Q: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what? Choices: - vibrate - pull - expand - contract A:
**Answer**
contract
Answer the following question given this paragraph: When two different alleles (heritable factors) are inherited together, one may be expressed, while the effect of the other may be "silenced. " In the case of pod color, the allele for green pods is always expressed and is dominant . The allele for yellow pods, which is not expressed, is recessive . For instance, if a plant inherits a "yellow-pod" allele and a "green pod" allele, it will have only green pods. Q: What's the term for an allele that's always expressed over another? Choices: - prevalent - mutated - recessive - dominant A:
dominant