Answer the following question given this paragraph: Starvation When the body is deprived of nourishment for an extended period of time, it goes into "survival mode. " The first priority for survival is to provide enough glucose or fuel for the brain. The second priority is the conservation of amino acids for proteins. Therefore, the body uses ketones to satisfy the energy needs of the brain and other glucose-dependent organs, and to maintain proteins in the cells (see Figure 24.2). Because glucose levels are very low during starvation, glycolysis will shut off in cells that can use alternative fuels. For example, muscles will switch from using glucose to fatty acids as fuel. Q: When the body goes into survival mode, it's first priority is to produce enough of which substance for the brain? Choices: - blood - insulin - plasma - glucose A:
glucose
(Question)
Answer the following question given this paragraph: Motor vehicles account for almost half of fossil fuel use. Most vehicles run on gasoline, which comes from petroleum. Q: Motor vehicles account for almost half of the consumption of what? Choices: - hydrocarbon - greenhouse gases - electricity - fossil fuel A:
(Answer)
fossil fuel
Ques: Answer the following question given this paragraph: Recall that air pollution is due to chemical substances and particles released into the air mainly by human actions. When most people think of air pollution, they think of the pollution outdoors. But it is just as easy to have indoor air pollution. Your home or school classroom probably doesn't get much fresh air. Sealing up your home reduces heating and cooling costs. But this also causes air pollution to stay trapped indoors. And people today usually spend a majority of their time indoors. So exposure to indoor air pollution can become a significant health risk. Q: What is caused by human actions that releases chemical substances and particles into the air? Choices: - CFO pollution - Improper Emissions - heavy pollution - air pollution A:
Ans: air pollution
(Q).
Answer the following question given this paragraph: Ocean water is most polluted along coasts. That's because pollution usually enters the water from land. Oil spills also pollute ocean water. Q: Where would you find most pollution of ocean water? Choices: - midocean - poles - trenches - coastline A:
(A).
coastline
Ques:Answer the following question given this paragraph: Air in the troposphere is warmer closer to Earth's surface. Warm air is less dense than cool air, so it rises higher in the troposphere. This starts a convection cell. Convection mixes the air in the troposphere. Rising air is also a main cause of weather. All of Earth's weather takes place in the troposphere. Q: Why does warm air rise higher in the troposphere? Choices: - it is more dense than cool air - It contains hydrogen - it is less flourishing than cool air - it is less dense than cool air A:

Ans:it is less dense than cool air
Answer the following question given this paragraph: Types of Receptors Receptors are protein molecules in the target cell or on its surface that bind ligand. There are two types of receptors, internal receptors and cell-surface receptors. Internal receptors Internal receptors, also known as intracellular or cytoplasmic receptors, are found in the cytoplasm of the cell and respond to hydrophobic ligand molecules that are able to travel across the plasma membrane. Once inside the cell, many of these molecules bind to proteins that act as regulators of mRNA synthesis (transcription) to mediate gene expression. Gene expression is the cellular process of transforming the information in a cell's DNA into a sequence of amino acids, which ultimately forms a protein. When the ligand binds to the internal receptor, a conformational change is triggered that exposes a DNA-binding site on the protein. The ligand-receptor complex moves into the nucleus, then binds to specific regulatory regions of the chromosomal DNA and promotes the initiation of transcription (Figure 9.4). Transcription is the process of copying the information in a cells DNA into a special form of RNA called messenger RNA (mRNA); the cell uses information in the mRNA (which moves out into the cytoplasm and associates with ribosomes) to link specific amino acids in the correct order, producing a protein. Internal receptors can directly influence gene expression without having to pass the signal on to other receptors or messengers. Q: What type of receptors, also known as intracellular or cytoplasmic receptors, are found in the cytoplasm of the cell and respond to hydrophobic ligand molecules that are able to travel across the plasma membrane? Choices: - external - essential - mechanical - internal A:
internal