Answer:
D.
Explanation:
Sufficient inheritable variations
The body is composed of several lymph nodes located in different regions. Half of the lymph nodes of the body are found in the abdomen area. The neck also contains high concentrations of lymph nodes. These are areas that have high concentrations of lymph nodes because they respond to certain levels of stress within the body when it is not in homeostasis.
Answer:
A. Chemical energy is used by each of the organisms in the food pyramid, resulting in less energy as it moves up the pyramid.
Explanation:
Green plants are autotrophs. They manufacture their own food through photosynthesis. Through sunlight, the food manufactured has chemical energy stored in them which is made available to the heterotrophs. Heterotrophs are mainly consumers, while autotrophs are producers.
Heterotrophs rely on autotrophs for their nutrition.
Thus, as consumers above at the top of the pyramid feeds on those below, the stored energy is being transferred up and used. These energy reduces as it goes up right to the top of the pyramid.
The best statement that describes how chemical energy is transferred up the pyramid is: "A. Chemical energy is used by each of the organisms in the food pyramid, resulting in less energy as it moves up the pyramid."
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Answer:
The chemical properties of an element are determined by the configuration of its electrons in orbit around its nucleus.
Explanation:
The number of electrons in each element’s outermost valence shell, is the primary factor in determining its chemical properties. The number of electrons in an atom are equal to the number of protons in the nucleus so the electrical charges balance each other. The number of protons in the nucleus of an atom is its Atomic Number.