Answer:
D
Explanation:
seismographs detect waves and vibration undergroud
Answer:
• neutrons
• protons
Explanation:
The nucleus is made up of two types of subatomic particles, that is the protons and neutrons.
Answer:
N
Explanation:
Both carbohydrates and lipids contain Carbon, Hydrogen, and Oxygen. However, all proteins have Nitrogen as well.
Answer:
B
Explanation:
An undifferentiated cell is such as that in a blastocyte. They are multipotent and can differentiate into any type of cells. The cells of the mass begin to have their gene differentially expressed (due to differential silencing of particular genes) hence the cell become determined. They become well organized into tissue such as skin and other organs.
