Hydrophobic substances such as vegetable oil are _____
A) nonpolar substances that repel water molecules
B) nonpolar substances that have an attraction for water molecules
C) polar substances that repel water molecules
D) polar substances that have an affinity for water
A
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A carpel is the
(a) same as a megasporophyll. (b) structure producing pollen grains. (c) component making up the anther. (d) synonym for microsporophyll.
Animals grow mainly by increasing the number of body cells, plants grow mainly by increasing cell
size.
Indicate whether the statement is true or false.Which disorder is the most common chromosome anomaly among newborns?
A) Turner syndrome B) Klinefelter syndrome C) Trisomy X D) XYY syndrome E) Down syndrome
Histones that are tightly wound by DNA and are the basic unit of chromatin are called
A. operons. B. nucleosomes. C. protein clusters. D. repressor genes. E. facilitators sites.