Answer the following question given this paragraph: Some echinoderms can reproduce asexually by fission, but most echinoderms reproduce sexually. They generally have separate sexes and external fertilization. Eggs hatch into free-swimming larvae. The larvae undergo metamorphosis to change into the adult form. During metamorphosis, their bilateral symmetry changes to radial symmetry. Q: How do most echinoderms reproduce? Choices: - asexually - flowering - grafting - sexually A:
sexually
Answer the following question given this paragraph: When acellular slime molds swarm, they fuse together to form a single cell with many nuclei. Q: When acellular slime molds swarm, they fuse together to form a single cell with many what? Choices: - digestive tracts - cytoplasm - lungs - nuclei A:
nuclei
Q: Answer the following question given this paragraph: For an exothermic chemical reaction, energy is given off as reactants are converted to products. In chemical reactions where the products have a higher energy than the reactants, the reactants must absorb energy from their environment to react. These reactions are endothermic and can be represented by an energy-level diagram like the one shown in http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gob-ch07_s04_f02. Figure 7.4 Endothermic Reactions. Q: For an exothermic chemical reaction, energy is given off as reactants are converted to what? Choices: - exports - forms - imports - products A:
A: products
Question: Answer the following question given this paragraph: Fossil evidence shows that amphibians evolved about 365 million years ago from a lobe-finned lungfish ancestor. As the earliest land vertebrates, they were highly successful. Some of them were much larger than today's amphibians. For more than 100 million years, amphibians remained the dominant land vertebrates. Then some of them evolved into reptiles. Once reptiles appeared, with their amniotic eggs, they replaced amphibians as the dominant land vertebrates. Q: What creatures evolved from a lobe-finned lungfish ancestor? Choices: - birds - horses - mice - amphibians A:
Answer: amphibians
*Question*
Answer the following question given this paragraph: 9.5 Simple Machines Simple machines are devices that can be used to multiply or augment a force that we apply often at the expense of a distance through which we apply the force. The word for "machine" comes from the Greek word meaning "to help make things easier. " Levers, gears, pulleys, wedges, and screws are some examples of machines. Energy is still conserved for these devices because a machine cannot do more work than the energy put into it. However, machines can reduce the input force that is needed to perform the job. The ratio of output to input force magnitudes for any simple machine is called its mechanical advantage (MA). Q: What is the greek word meaning "to help make things easier"? Choices: - toy - battery - mode - machine A:
**Answer**
machine
(Q).
Answer the following question given this paragraph: The lungs are the main organs of the respiratory system. This is where gases are exchanged between the air and the blood. Gases are also transported by the blood and exchanged between the blood and all the cells of the body. Q: What are the main organs of the respiratory system? Choices: - ovaries - intestines - kidneys - lungs A:
(A).
lungs