Q: Q: The structure of the human tail bone is called what? Read this paragraph and choose the correct option from the provided answers: The majority of human genes have two or more possible alleles , which are alternative forms of a gene. Differences in alleles account for the considerable genetic variation among people. In fact, most human genetic variation is the result of differences in individual DNA bases within alleles. Choices: - a abnormal structure - a vital structure - an artifact - a vestigial structure A:
A: a vestigial structure

Q: Q: What type of climates are found around the equator? Read this paragraph and choose the correct option from the provided answers: Tropical climates are found around the Equator. As you'd expect, these climates have warm temperatures year round. The warm air rises at the Equator. As it rises, it cools, causing it to rain. Tropical climates may be very wet, or wet and dry. Choices: - arid - tundras - arctics - tropical A:
A: tropical

Q: Q: How did a vascular let plants grow? Read this paragraph and choose the correct option from the provided answers: The evolution of vascular tissue revolutionized the plant kingdom. Vascular tissue greatly improved the ability of plants to absorb and transfer water. This allowed plants to grow larger and taller. They could also liver in drier habitats and survive periods of drought. Early vascular plants probably resembled the fern in Figure below . Choices: - they could conduct photosynthesis - they could bear fruit - they could reproduce - they could grow taller A:
A: they could grow taller

Q: Q: What is the sum of the massess of the atoms in a molecule? Read this paragraph and choose the correct option from the provided answers: The molecular mass is the sum of the masses of the atoms in a molecule. Choices: - underlying mass - magnetic mass - nuclear mass - molecular mass A:
A: molecular mass