As many as 20% of present-day angiosperms are wind pollinated
A. true
B. false
A
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Answer the following statements true (T) or false (F)
1. The current model that best describes biomembranes is the Rigid Mosaic Model. 2. Diffusion is the movement of a molecule from an area of high to low concentration. 3. Osmosis describes the movement of water from an area of high to low solute concentration. 4. Movement of molecules down their concentration gradient can drive the movement of a different molecule against its concentration gradient.
Kidneys filter water and all solutes except ___
from the blood.
a. urea b. potasium c. proteins d. chloride ions e. monosaccharides
An organism displays some growth at 4 degrees Celsius and at 25 degrees Celsius. However, it grows best at 20 degrees Celsius. This organism would be classified as a _________
Fill in the blank(s) with the appropriate word(s).
Some bacterial transposons, known as Tn elements, are larger than insertion sequences (IS elements) and contain protein-coding genes that have human health significance. What might such a bacterial transposon contain?
A) dissociation element B) proto-oncogene C) drug resistance D) pseudogene E) oncogene