Answer:
The correct answer is - Mutation in particular DNA segments can lead to the loss of apoptotic control which allows the cancerous or damaged cells to survive longer.
Explanation:
An error or change in a DNA segment or DNA repair gene mistakes become mutations if not corrected. These mutations may lead to change in the function of the specific functions that may lead to cancer. Such mutations are tumor suppressor genes or oncogenes. The activities of genes regulate the signal when they detect damaged cells and such cells should undergo apoptosis (programmed cell death).
The loss of apoptotic control by a mutation in such genes allows cancer cells to not follow apoptosis and leads to survival for a longer time and allow them to divide, accumulate and proliferate.
Answer:
Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
Answer:
3
Explanation:
wet mount of elodea( a simple plant)
This statement is not true of cilia in the respiratory tract: THEY CLOSE THE WIND PIPE OPENING WHEN SWALLOWING.
Respiratory cilia are hair like structures that are find in the respiratory tract. Their major function is filtration of air for removal of contaminants. They are also capable of removing foreign objects such as smoke, dust and inhaled particles such as pollen from the respiratory system. Another functions perform by the cilia is the movement of mucus away from the lungs into the throat thus helping to protect the lungs from infection.
The closing of wind pipe when swallowing is not part of the functions of the cilia, that role is performed by the epiglottis.
