Ques:Answer the following question given this paragraph: Hydrogen bonds cause water to have a relatively high boiling point of 100C (212F). Because of its high boiling point, most water on Earth is in a liquid state rather than in a gaseous state. Water in its liquid state is needed by all living things. Hydrogen bonds also cause water to expand when it freezes. This, in turn, causes ice to have a lower density (mass/volume) than liquid water. The lower density of ice means that it floats on water. For example, in cold climates, ice floats on top of the water in lakes. This allows lake animals such as fish to survive the winter by staying in the water under the ice. Q: What bonds cause water to have a high boiling point, leaving most water on earth in a liquid state rather than in a gaseous state? Choices: - potassium bonds - carbon bonds - helium bonds - hydrogen bonds A:

Ans:hydrogen bonds
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Ques:Answer the following question given this paragraph: A Mendelian trait is a trait that is controlled by a single gene that has two alleles. One of these alleles is dominant and the other is recessive. Many inheritable conditions in humans are passed to offspring in a simple Mendelian fashion. Medical professionals use Mendel's laws to predict and understand the inheritance of certain traits in their patients. Also, farmers, animal breeders, and horticulturists who breed organisms can predict outcomes of crosses by understanding Mendelian inheritance and probability. Q: A trait controlled by a single gene that has two alleles is given what name, after the scientist who studied inheritance? Choices: - darwinian trait - rosilin trait - carlinian trait - mendelian trait A:

Ans:mendelian trait
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Ques:Answer the following question given this paragraph: Each field of life science has its own specific body of knowledge and relevant theories. However, two theories are basic to all of the life sciences. They form the foundation of every life science field. They are the cell theory and the theory of evolution by natural selection. Both theories have been tested repeatedly. Both are supported by a great deal of evidence. Q: The cell theory and the theory of evolution by natural selection are basic to all fields in what branch of science? Choices: - rock science - zoology - chemistry - life science A:

Ans:life science
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Ques:Answer the following question given this paragraph: The sodium chloride dissociates into two ions, while the glucose does not dissociate. Therefore, equal concentrations of each solution will result in twice as many dissolved particles in the case of the sodium chloride. The vapor pressure of the sodium chloride solution will be lowered twice the amount as the glucose solution. Q: How many different kinds of ions are produced when sodium chloride dissociates ? Choices: - five - one - three - two A:

Ans:
two
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