Ques:Answer the following question given this paragraph: Sharks have well-developed sense organs that aid them in locating prey, including a keen sense of smell and electroreception, with the latter perhaps the most sensitive of any animal. Organs called ampullae of Lorenzini allow sharks to detect the electromagnetic fields that are produced by all living things, including their prey. Electroreception has only been observed in aquatic or amphibious animals. Sharks, together with most fishes and aquatic and larval amphibians, also have a sense organ called the lateral line, which is used to detect movement and vibration in the surrounding water, and is often considered homologous to "hearing" in terrestrial vertebrates. The lateral line is visible as a darker stripe that runs along the length of a fish's body. Sharks reproduce sexually, and eggs are fertilized internally. Most species are ovoviviparous: The fertilized egg is retained in the oviduct of the mother's body and the embryo is nourished by the egg yolk. The eggs hatch in the uterus, and young are born alive and fully functional. Some species of sharks are oviparous: They lay eggs that hatch outside of the mother's body. Embryos are protected by a shark egg case or "mermaid's purse" (Figure 29.12) that has the consistency of leather. The shark egg case has tentacles that snag in seaweed and give the newborn shark cover. A few species of sharks are viviparous: The young develop within the mother's body and she gives live birth. Q: What organ do most fish have that is used to detect movement and vibration in the surrounding water? Choices: - nares - operculum - eye - lateral line A:

Ans:lateral line
-----
Ques:Answer the following question given this paragraph: Less energy is needed to get renewable energy sources. Solar energy is a good example. Sunlight is everywhere, so no one needs to go out and find it. We don't have to drill for it or pump it to the surface. We just need to install solar panels like the ones in Figure below and let sunlight strike them. The energy from the sunlight is changed to electricity. The electricity is used to power lights and appliances in the house. So solar energy doesn't have to be transported. Q: What renewable energy source converts energy from the sunlight into electricity? Choices: - geophysical energy - geothermal energy - hydrostatic energy - solar energy A:

Ans:solar energy
-----
Ques:Answer the following question given this paragraph: Valence electrons are the outer-shell electrons of an atom. Q: What are the outer-shell electrons of an atom called? Choices: - outer electrons - organism electrons - helium electrons - valence electrons A:

Ans:valence electrons
-----
Ques:Answer the following question given this paragraph: Experimental controls are other factors that might affect the dependent variable. They are kept constant so they will not affect the results of the experiment. Q: In an experiment, what is kept constant so they will not affect the results, including affecting the dependent variable? Choices: - atmospheric controls - similar controls - educated controls - experimental controls A:

Ans:
experimental controls
-----