Natural selection results in organisms perfectly adapted to their environments
Indicate whether the statement is true or false.
ANS: F, well adapted, never perfect
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A single unit of hereditary that contains the information for an individual protein is referred to as a ____
Some hep with this, please?
One of the reasons study of nitrogen use in plants is of special interest is because:
A. Nitrogen is limited in our atmosphere. B. Nitrogen in its atmospheric form is not useable by plants. C. Nitrogen is often toxic to plants. D. None of the forms of nitrogen are easily absorbed by plants. E. Nitrogen is not an essential element for plant growth.
Which of the chromosomes in the image at right are identical to one another before Meiosis I?
1.sister chromatids A and B only
2.sister chromatids C and D only
3.sister chromatids A and C only
4.homologues in image E
5.separated sister chromatids in image F
6.both sister chromatids A/B and C/D
Which statement is false?
A) Stems and leaves depend on the water and minerals absorbed by the roots. B) Roots depend upon sugars produced in photosynthetic organs such as leaves. C) Plant root hairs help to absorb carbon dioxide from the soil. D) The shoot system of a plant consists of the stems, leaves, and adaptations for reproduction.