Answer: The immune system
Explanation:
The immune system is a complex network of proteins and cells that defends the body against infection or any invasion. The human defense system in the body is actually made up of entire organs and vessel systems like the lymph vessels. The immune system is made up of organs that control the production and maturation of certain defense cells.
Initially, all living things are subjected to attack from disease causing agents. Even bacteria, so small that more than a million could fit on the head of a pin, have systems to defend against infection by viruses. This kind of protection gets more sophisticated as organisms become more complex.
Hmm.this one is complicated .many factors affect the amount of solar energy an area receives but mainly the length of the solar rays.places close to the equator are hotter because the rays are short and the travel less distance.but away from the equator the rays are longer
Answer:
DNA is found in nearly all living cells. ... Although each organism's DNA is unique, all DNA is composed of the same nitrogen-based molecules. So how does DNA differ from organism to organism? It is simply the order in which these smaller molecules are arranged that differs among individuals.
Answer:
Osteoclasts.
Explanation:
Osteoclasts may be defined as the cells that helps in the breakdown of the bone tissue. Osteoclast plays an important role in the maintenance of the bone structure.
Osteoclasts cells are found in the small depression of the endosoteal surface. This is also known as Howship's lacunae. They shows the foamy appearance in the cell. The osteoclast can form the specialized cell membrane known as ruffle border.
Thus, the correct answer is option (B).
