Living or dead organisms that occupy an organism's habitat are called biotic factors.
Answer the following statement true (T) or false (F)
True
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Histone proteins
A) are male sex hormones. B) are inert spool-like structural supports around which DNA winds. C) control gene expression through chemical interactions that expose parts of the DNA to transcription factors, while shielding other parts. D) bind to mRNAs, preventing their translation into protein.
What is the environmental advantage of using strip logging?
1.Runoff from the cleared area rolls down to the previously logged region below.
2.Small strips of logged areas can provide wildlife corridors.
3.The road is cut along a streambed to avoid disrupting the forest ecosystem.
4.Strip logging involves planting strips of different species to try to increase biodiversity.
In the construction of a YAC library, each chromosome has the advantage of being able to hold very long DNA sequences. However, besides selectable marker(s) the YAC vector must minimally include which of the following?
A) a bacterial origin (ori) B) cos site(s) and origin C) centromere, telomeres, and yeast origin D) centromere and origin E) centromere and telomeres
If Na+ levels were depleted in the extracellular fluid, rate of glucose movement would
A. decrease. B. stay the same. C. increase.