Q: What is to blame for water's boiling point (100c) being higher than the boiling points of similar substances? Read this paragraph and choose the correct option from the provided answers: Hydrogen bonds also explain why water's boiling point (100C) is higher than the boiling points of similar substances without hydrogen bonds. Because of water's relatively high boiling point, most water exists in a liquid state on Earth. Liquid water is needed by all living organisms. Therefore, the availability of liquid water enables life to survive over much of the planet. Choices: - electrode bonds - molecular shape - helium bonds - hydrogen bonds A:
hydrogen bonds

(Question)
Q: As roots grow longer they will always do what? Read this paragraph and choose the correct option from the provided answers: Roots have primary and secondary meristems for growth in length and width. As roots grow longer, they always grow down into the ground. Even if you turn a plant upside down, its roots will try to grow downward. How do roots "know" which way to grow? How can they tell down from up? Specialized cells in root caps are able to detect gravity. The cells direct meristem in the tips of roots to grow downward toward the center of Earth. This is generally adaptive for land plants. Can you explain why?. Choices: - change direction - get larger - get thicker - grow downward A:
(Answer)
grow downward

Ques: Q: Physical and chemical properties of geometric isomers are generally what? Read this paragraph and choose the correct option from the provided answers: Physical and chemical properties of geometric isomers are generally different. While cis -2-butene is a polar molecule, trans -2-butene is nonpolar. Heat or irradiation with light can be used to bring about the conversion of one geometric isomer to another. The input of energy must be large enough to break the pi bond between the two carbon atoms, which is weaker than the sigma bond. At that point, the now single bond is free to rotate and the isomers can interconvert. Choices: - round - difficult - similar - different A:
Ans: different

(Q).
Q: What is the process resulting in living things with beneficial traits producing more offspring? Read this paragraph and choose the correct option from the provided answers: The other idea is that evolution occurs by natural selection . Natural selection is the process that results in living things with beneficial traits producing more offspring than others. This results in changes in the traits of living things over time. Choices: - fluid selection - Natural choice. - natural change - natural selection A:
(A).
natural selection

Ques:Q: Plant viruses can seriously disrupt crop growth and development, significantly affecting our what? Read this paragraph and choose the correct option from the provided answers: Plant viruses can seriously disrupt crop growth and development, significantly affecting our food supply. They are responsible for poor crop quality and quantity globally, and can bring about huge economic losses annually. Others viruses may damage plants used in landscaping. Some viruses that infect agricultural food plants include the name of the plant they infect, such as tomato spotted wilt virus, bean common mosaic virus, and cucumber mosaic virus. In plants used for landscaping, two of the most common viruses are peony ring spot and rose mosaic virus. There are far too many plant viruses to discuss each in detail, but symptoms of bean common mosaic virus result in lowered bean production and stunted, unproductive plants. In the ornamental rose, the rose mosaic disease causes wavy yellow lines and colored splotches on the leaves of the plant. Choices: - air supply - fuel supply - harvest supply - food supply A:

Ans:food supply

Ques: Q: Biological macromolecules are organic, which means that they must contain what? Read this paragraph and choose the correct option from the provided answers: 2.3 | Biological Molecules By the end of this section, you will be able to: Describe the ways in which carbon is critical to life Explain the impact of slight changes in amino acids on organisms Describe the four major types of biological molecules Understand the functions of the four major types of molecules The large molecules necessary for life that are built from smaller organic molecules are called biological macromolecules. There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions. Combined, these molecules make up the majority of a cell's mass. Biological macromolecules are organic, meaning that they contain carbon. In addition, they may contain hydrogen, oxygen, nitrogen, phosphorus, sulfur, and additional minor elements. Choices: - hydrogen - aluminum - oxygen - carbon A:
Ans:
carbon