Q: What are the main organs for breathing in a mammal? Read this paragraph and choose the correct option from the provided answers: All mammals have lungs that are the main organs for breathing. Lung capacity has evolved to support the animal's activities. During inhalation, the lungs expand with air, and oxygen diffuses across the lung's surface and enters the bloodstream. During exhalation, the lungs expel air and lung volume decreases. In the next few sections, the process of human breathing will be explained. Choices: - gills - nostrils - intestines - lungs A:
lungs

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Q: Oils are liquid lipids that plants use to store what? Read this paragraph and choose the correct option from the provided answers: Oils are liquid lipids that plants use to store energy. Examples of oils include olive oil and corn oil. Choices: - fat - carbo - Protein - energy A:
(Answer)
energy

Ques: Q: Which theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals? Read this paragraph and choose the correct option from the provided answers: Molecular orbital theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals. Using quantum mechanics, the behavior of an electron in a molecule is still described by a wave function, , analogous to the behavior in an atom. Just like electrons around isolated atoms, electrons around atoms in molecules are limited to discrete (quantized) energies. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital (2). Like an atomic orbital, a molecular orbital is full when it contains two electrons with opposite spin. We will consider the molecular orbitals in molecules composed of two identical atoms (H2 or Cl2, for example). Such molecules are called homonuclear diatomic molecules. In these diatomic molecules, several types of molecular orbitals occur. The mathematical process of combining atomic orbitals to generate molecular orbitals is called the linear combination of atomic orbitals (LCAO). The wave function describes the wavelike properties of an electron. Molecular orbitals are combinations of atomic orbital wave functions. Combining waves can lead to constructive interference, in which peaks line up with peaks, or destructive interference, in which peaks line up with troughs. Choices: - molecular distribution theory - atomic orbital theory - atomic distribution theory - molecular orbital theory A:
Ans: molecular orbital theory

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Q: What type of chemicals do ants communicate with? Read this paragraph and choose the correct option from the provided answers: We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy. Choices: - Alkanes - pesticides - hormones - pheromones A:
(A).
pheromones

Ques:Q: What kind of rays can travel thousands of meters through air and can penetrate and damage cells deep inside the body? Read this paragraph and choose the correct option from the provided answers: Alpha particles can travel only a few centimeters through air. They can burn the skin but not penetrate it. Beta particles can travel up to a meter through air. They can penetrate and damage skin. Gamma rays can travel thousands of meters through air. They can penetrate and damage cells deep inside the body. Choices: - x-rays - cosmic rays - plasma rays - gamma rays A:

Ans:gamma rays

Q: What is the only metal that is liquid at room temperature? Read this paragraph and choose the correct option from the provided answers: A familiar liquid is mercury metal. Mercury is an anomaly. It is the only metal we know of that is liquid at room temperature. Mercury also has an ability to stick to itself (surface tension) a property all liquids exhibit. Mercury has a relatively high surface tension, which makes it very unique. Here you see mercury in its common liquid form. Choices: - hydrogen - gas - water - mercury A:
mercury