Answer the following question given this paragraph: Electric charge is a physical property of particles or objects that causes them to attract or repel each other without touching. All electric charge is based on the protons and electrons in atoms. A proton has a positive electric charge, and an electron has a negative electric charge (see Figure below ). Q: What kind of charge does a proton have? Choices: - ionic - constant - negative - positive A:
positive
(Question)
Answer the following question given this paragraph: 21.2 | Threats to Biodiversity By the end of this section, you will be able to: Identify significant threats to biodiversity Explain the effects of habitat loss, exotic species, and hunting on biodiversity Identify the early and predicted effects of climate change on biodiversity The core threat to biodiversity on the planet, and therefore a threat to human welfare, is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and those resources are being removed unsustainably from the environment. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of exotic species. The first two of these are a direct result of human population growth and resource use. The third results from increased mobility and trade. A fourth major cause of extinction, anthropogenic (human-caused) climate change, has not yet had a large impact, but it is predicted to become significant during this century. Global climate change is also a consequence of human population needs for energy and the use of fossil fuels to meet those needs (Figure 21.7). Environmental issues, such as toxic pollution, have specific targeted effects on species, but are not generally seen as threats at the magnitude of the others. Q: The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of what? Choices: - solar radiation - carbon dioxide - carbon monoxide - exotic species A:
(Answer)
exotic species
Ques: Answer the following question given this paragraph: Behind each release of gas is an army of gut bacteria undergoing some crazy biochemistry. These bacteria break down the remains of digested food through fermentation, creating gas in the process. Learn what these bacteria have in common with beer brewing at http://youtu. be/R1kxajH629A?list=PLzMhsCgGKd1hoofiKuifwy6qRXZs7NG6a . Q: Bacteria break down the remains of digested food through a processed called what? Choices: - regulation - oxidation - synthesis - fermentation A:
Ans: fermentation
(Q).
Answer the following question given this paragraph: What is a cell? Gradient Physical difference between two regions of space, in such a way that the molecules tend to move in response to the gradients. Diffusion Movement of the molecules in a fluid, from the regions of high concentration to those of low concentration. Passive transport Movement of substances in a membrane that doesn't need to use energy. Simple diffusion Diffusion of water, gases or molecules across the membrane. Facilitated diffusion Diffusion of molecules across the membranes with the participation of proteins. Osmosis Diffusion of the water across a membrane with differential permeability. Transport that needs energy Movement of substances across a membrane generally in opposition to a gradient of concentration with the requirement of energy. Active transport Movement of small molecules using energy (ATP). Endocytosis Movement of big particles towards the interior of the cell using energy. The cells enclose particles or liquids. Pinocytosis (Literally cell drinking) Form in which the cell introduces liquids. Phagocytosis Way of eating of the cells. It feeds in this case of big particles or entire microorganisms. Pseudopods False feet (the amoeba). Exocitosis Movement of materials out of the cell with the use of energy. It throws waste material. Isotonic The cytoplasm fluid of the interior of the cells is the same that the outer. Hypertonic solution. Q: Pseudopods are false what? Choices: - eyes - teeth - fingers - feet A:
(A).
feet
Ques:Answer the following question given this paragraph: Several substances HCl, NH 3 , and SO 2 have solubility that decreases as temperature increases. They are all gases at standard pressure. When a solvent with a gas dissolved in it is heated, the kinetic energy of both the solvent and solute increases. As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases. Q: When a solvent with a gas dissolved in it is heated, the kinetic energy of both the solvent and solute _________? Choices: - evaporates - generates - decreases - increases A:

Ans:increases
Ques:Answer the following question given this paragraph: Q: What specific part of the african violet is used to propagate other plants? Choices: - petals - spores - roots - leaves A:

Ans:
leaves