(Q).
Q: What term refers to a group of individuals of the same species that live in the same area and is the unit of natural selection, adaptation, and microevolution? Read this paragraph and choose the correct option from the provided answers: A population is a group of individuals of the same species that live in the same area. The population is the unit of natural selection, adaptation, and microevolution. In ecology, how large a population is and how quickly it is growing are often used as measures of a species' health. Choices: - ecosystem - taxonomy - community - population A:
(A).
population

(Q).
Q: A period is a horizontal row of the what? Read this paragraph and choose the correct option from the provided answers: A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements. Periods 6 and 7 have 32 elements because the two bottom rows that are separated from the rest of the table belong to those periods. They are pulled out in order to make the table itself fit more easily onto a single page. Choices: - cycles table - phases table - species table - periodic table A:
(A).
periodic table

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Q: Resonance has been used in what kind of human-made recreational objects since prehistoric times? Read this paragraph and choose the correct option from the provided answers: Figure 17.33 Resonance has been used in musical instruments since prehistoric times. This marimba uses gourds as resonance chambers to amplify its sound. (credit: APC Events, Flickr). Choices: - toys - paintbrushes - arrows - musical instruments A:
(A).
musical instruments