Chromatin
is composed of a DNA and a protein. The DNA is a double helix in the cell
nucleus packaged by histones, a special type of protein. Together they form the
chromatin with a basic structural unit called nucleosome. The chromatin's functions are:
a. to
package DNA into smaller volumes to fit in the cell.
b. to
allow mitosis by reinforcing the DNA macromolecule
c. to
prevent damaging of the DNA
<span>d.to
control gene expression and DNA replication</span>
Answer:
One building block
Explanation:
The prefix mono means one
The answer is <span>xerophyte.
First, let's distinguish these three terms:
- Mesophyte (meso - middle; phyte - plant) - plants that live in conditions with moderate amount of water.
- Hydrophyte (hydro - water; </span><span>phyte - plant) - plants that live in water.
- Xerophyte (xero - arid; </span><span>phyte - plant) - plants that live in arid conditions, where water is scare.
Since there is no water in deserts, which are characterized by arid conditions, that means that the desert plants are xerophytes.</span>