A period<span> is the name given to a horizontal row of the periodic table. The periodic table has seven </span>periods<span>. </span>Period<span> 1 contains only two elements: hydrogen and helium.</span>
Answer:
Inhibitors of cyclin-dependent kinases might play a role in regulating the concentration of cyclin in the cell cycle.
Explanation:
The presence of inhibitors of cyclin-dependent kinases has a great importance because it controls the concentration of cyclin that is necessary for the cell cycle. If inhibitors of cyclin-dependent kinases is absent , the amount of cyclin increases in the cell formation and cause a great damage to the cell cycle and the cell which is produced is abnormal or other irregularities.
The part of a cell that gives the cell unique characteristics is the Nucleus
Answer:
The correct answer is option a. "down syndrome; heart problems".
Explanation:
Down syndrome is a disorder that is developed in people with an extra chromosome 21. People with Down syndrome are intellectually disabled and have the physical characteristics of having short fingers, slanted eyes, and a protruding tongue, as well as a decreased musculature, a short neck and a small head. Children with Down syndrome usually suffer from heart problems, the most common being the Atrioventricular Septal Defect.
Answer:
Here are some of the differences I find
Explanation:

The red arrows in the diagrams below point to these structures in animal and plant cells.