Answer the following question given this paragraph: The patterns of atoms that make a mineral affect its physical properties. A mineral's crystal shape is determined by the way the atoms are arranged. For example, you can see how atoms are arranged in halite in Figure above . You can see how salt crystals look under a microscope in Figure below . Salt crystals are all cubes whether they're small or large. Q: A mineral's crystal shape is determined by the way what objects are arranged? Choices: - molecules - particles - Electrons - atoms A:
atoms
(Question)
Answer the following question given this paragraph: Some bacteria also have tail-like structures called flagella ( Figure below ). Flagella help bacteria move. As the flagella rotate, they spin the bacteria and propel them forward. It is often said the flagella looks like a tiny whip, propelling the bacteria forward. Though some eukaryotic cells do have a flagella, a flagella in eukaryotes is rare. Q: What type of cells are flagella rare in? Choices: - intracellular - cancer. - synthetic - eukaryotic A:
(Answer)
eukaryotic
Ques: Answer the following question given this paragraph: In an equilibrium population, allele and genotype frequencies do not change over time. Q: In what type of population do allele and genotype frequencies not change over time? Choices: - saturation population - inequilibrium population - shape population - equilibrium population A:
Ans: equilibrium population
(Q).
Answer the following question given this paragraph: Q: Sharks are an example of an animal with sharp vision that is nonetheless unable to distinguish what? Choices: - depth - shapes - contrast - color A:
(A).
color
Ques:Answer the following question given this paragraph: Cellulose is the most abundant biochemical compound. It makes up the cell walls of plants and gives support to trunks and stems. Cellulose also provides needed fiber in the human diet. We can't digest cellulose, but it helps keep food wastes moving through the digestive tract. Q: What is the most abundant biochemical compound, making up the cell walls of plants? Choices: - magnesium - cytoplasm - mitochondria - cellulose A:

Ans:cellulose
Ques:Answer the following question given this paragraph: Xerography Most copy machines use an electrostatic process called xerographya word coined from the Greek words xeros for dry and graphos for writing. The heart of the process is shown in simplified form in Figure 18.39. A selenium-coated aluminum drum is sprayed with positive charge from points on a device called a corotron. Selenium is a substance with an interesting propertyit is a photoconductor. That is, selenium is an insulator when in the dark and a conductor when exposed to light. In the first stage of the xerography process, the conducting aluminum drum is grounded so that a negative charge is induced under the thin layer of uniformly positively charged selenium. In the second stage, the surface of the drum is exposed to the image of whatever is to be copied. Where the image is light, the selenium becomes conducting, and the positive charge is neutralized. In dark areas, the positive charge remains, and so the image has been transferred to the drum. The third stage takes a dry black powder, called toner, and sprays it with a negative charge so that it will be attracted to the positive regions of the drum. Next, a blank piece of paper is given a greater positive charge than on the drum so that it will pull the toner from the drum. Finally, the paper and electrostatically held toner are passed through heated pressure rollers, which melt and permanently adhere the toner within the fibers of the paper. Q: What term is used to describe the electrostatic process used by most copy machines? Choices: - electrography - titanomachy - microphotography - xerography A:

Ans:
xerography