There are different ideas of how humans came to be, depending on if you’re going from a scientific or religious point of view.
For instance, scientifically, humans evolved from Chimpanzees. This is further supported by similar genetic make up as well as intelligence an actions.
Religiously, Christianity specifically, states that humans were made by God - specifically Adam and Eve.
Different perspectives, different answers.
However, if you’re asking for human make up, start with the basics of atoms and go up through layers of systems.
Hope this helps!
Answer: "homeostasis" .
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This will help http://www.answers.com/Q/What_is_the_result_of_the_diversity_of_organisms_present_on_earth
Answer:
Option D, Gastric Juices
Explanation:
The second line of defense is a non specific defense mechanism in which no specific individual is targeted but all invaders are killed in general way. Some common mode of second line of defense are - Phagocytic cells (white blood cells), inflammatory responses, macrophage system etc. The second line of defense comes into action when the invader has surpassed the first line of defense which include either physical barrier like skin, mucous membrane, hair, cilia etc. or chemical barriers like gastric juices, saliva, Hyaluronic acid etc.
Hence, gastric juice does not belong to second line of defense.
Thus, option D is correct.
DNA is the genetic composition of the cells in the human body, think of it as the coding for a computer but for cells. These carry your genetic composition (blue eyes, Brown hair, tall, short blah blah blah) and traits like smart, funny, shy.
Hope that helps.
