Answer the following question given this paragraph: Figure 18.7 Zinc is an active transition metal. It dissolves in hydrochloric acid, forming a solution of colorless Zn 2+ ions, Cl ions, and hydrogen gas. Q: Zinc is what kind of metal.? Choices: - active flow metal - active move metal - passive stagnant metal - active transition metal A:
active transition metal
(Question)
Answer the following question given this paragraph: Cycle of Sexual Reproduction. Sexual reproduction involves the production of haploid gametes by meiosis. This is followed by fertilization and the formation of a diploid zygote. The number of chromosomes in a gamete is represented by the letter n. Why does the zygote have 2n, or twice as many, chromosomes?. Q: Sexual reproduction involves the production of haploid gametes by what? Choices: - lesions - mutations - mitosis - meiosis A:
(Answer)
meiosis
Ques: Answer the following question given this paragraph: Ketones are carbonyls in which the carbon atom makes single bonds with two other carbon atoms. Ketones are less reactive than aldehydes and are a common component in nail polish removers and paint strippers. Q: What word describes a carbonyl where the carbon atom makes single bonds with two others? Choices: - acetone - ions - photons - ketones A:
Ans: ketones
(Q).
Answer the following question given this paragraph: CHAPTER REVIEW 3.1 The Cell Membrane The cell membrane provides a barrier around the cell, separating its internal components from the extracellular environment. It is composed of a phospholipid bilayer, with hydrophobic internal lipid "tails" and hydrophilic external phosphate "heads. " Various membrane proteins are scattered throughout the bilayer, both inserted within it and attached to it peripherally. The cell membrane is selectively permeable, allowing only a limited number of materials to diffuse through its lipid bilayer. All materials that cross the membrane do so using passive (non energy-requiring) or active (energy-requiring) transport processes. During passive transport, materials move by simple diffusion or by facilitated diffusion through the membrane, down their concentration gradient. Water passes through the membrane in a diffusion process called osmosis. During active transport, energy is expended to assist material movement across the membrane in a direction against their concentration gradient. Active transport may take place with the help of protein pumps or through the use of vesicles. Q: How does a cell's membrane keep extracellular materials from mixing with it's internal components? Choices: - absorbs extracellular materials - repels extracellular materials - destroys extracellular materials - provides a barrier A:
(A).
provides a barrier
Ques:Answer the following question given this paragraph: Body waves travel through the body of a planet. Surface waves travel along the surface. Q: What type of waves travel through the body of a planet? Choices: - vacuum waves - gas waves - energy waves - body waves A:

Ans:body waves
Answer the following question given this paragraph: The sketch below shows how we see an image in a plane mirror. Plane mirrors work because the light rays create a virtual image behind the mirror. Light rays from the object strike the mirror and reflect according to the law of reflection. When some of the light rays enter our eye, our eye and brain interpret these rays as having traveled in a straight line path. Therefore, our eye and brain track the light rays backward to a position from which they appear to have come. At this position, we see an image. Q: Plane mirrors work because the light rays create what behind the mirror? Choices: - a mirror image - a entire image - a virtual example - a virtual image A:
a virtual image