Explanation:
Karyotyping is <u>a test to examine chromosomes in a sample of cells</u>. This test can help identify genetic problems as the cause of a disorder or disease.

The answer to this would be C.
As children grow, they gain more cells due to multiplication.
I don't know exactly what you mean but the size of a group affects its defense because there is a larger group. Therefore, more people would be protecting it, adding more to its defense.
A fire is one because it doesn’t matter if zero squirrels are in the forest or none fire will still burn with or without the squirrels
Answer:
The answer is letter D
Explanation:
Purple, spherical-shaped organisms arranged in chainlike formations.