Answer: False The vaccines help to prevent them and sometimes cure them.
Answer:
D
Explanation:
Aseual reproduction is a type of reproduction in which new organisms are reproduce from single parent without production of gametes. But in D their is fusion of gametes (egg and sperm) therefore it explains to us that it is not an aseual reproduction.
The answer is D.
"An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure."
The cells of SA node acts as the heart's peacemaker which establishes the pace for cardiac activity.
Sinoatrial node is also called sinus node.
SA node is termed as a group of cells which are located in the wall of the right atrium of the heart. Cells have the ability to produce electrical impulse. It travels to the heart via electrical conduction system which causes it to contract.
It produces action potential and also sets the rhythm of the heart.
Explanation:
The dog salivating is an example of responding to stimuli
