Answer the following question given this paragraph: Q: Acting like drawstrings to close off the alimentary canal, what regulates the passage of material between compartments? Choices: - intestine - hamstring - uterus - sphincter A:
sphincter
(Question)
Answer the following question given this paragraph: Covalent bonds are chemical bonds between atoms of nonmetals that share valence electrons. In some covalent bonds, electrons are not shared equally between the two atoms. These are called polar covalent bonds. The Figure below shows the polar bonds in a water molecule (H 2 O). The oxygen atom attracts the shared electrons more strongly than the hydrogen atoms do because the nucleus of the oxygen atom has more positively charged protons. As a result, the oxygen atom becomes slightly negative in charge, and the hydrogen atoms become slightly positive in charge. For another example of polar bonds, see the video at this URL: http://www. youtube. com/watch?v=1lnjg81daBs. Q: What are chemical bonds between atoms of nonmetals that share valence electrons called? Choices: - electron bonds - ionic bonds - gravitational bonds - covalent bonds A:
(Answer)
covalent bonds
Ques: Answer the following question given this paragraph: Smooth muscles in arteries and veins are largely responsible for regulation of blood pressure. Q: The muscles in arteries and veins that are largely responsible for regulation of blood pressure are known as what type? Choices: - opposing muscles - vascular muscles - elongated muscles - smooth muscles A:
Ans: smooth muscles
(Q).
Answer the following question given this paragraph: Bony fish may live in salt water or freshwater. They consume a wide range of foods. For example, they may eat algae, smaller fish, detritus, or dead organisms, depending on the species of fish. Q: Bony fish can live in either of what type of aquatic biome? Choices: - coral reefs or freshwater - oceans or estuaries - estuaries or saltwater - saltwater or freshwater A:
(A).
saltwater or freshwater
Ques:Answer the following question given this paragraph: Hotspots may also be active at plate boundaries. This is especially common at mid-ocean ridges. Iceland is formed by a hotspot along the Mid-Atlantic Ridge. Q: Which country is formed by a hotspot along the mid-atlantic ridge? Choices: - finland - norway - Switzerland - iceland A:

Ans:iceland
Ques: Answer the following question given this paragraph: There are three components that make up an electrochemical reaction. There must be a solution where redox reactions can occur. These reactions generally take place in water to facilitate electron and ion movement. A conductor must exist for electrons to be transferred. This conductor is usually some kind of wire so that electrons can move from one site to another. Ions also must be able to move through some form of salt bridge that facilitates ion migration. Q: What allows the electrons to move in an electrochemical system. Choices: - conduction - mass - magnetism - conductor A:
Ans:
conductor