The B cells are not considered as first line defense structures of the immune’s system
Answer: Option C
<u>Explanation:</u>
Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.
The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.
Answer:
I think Fungi is the correct answer
According to the climate change, the correct order is :
<span>1 - Sources emit greenhouse <span>gases.
</span></span>CO₂ makes up the vast majority of greenhouse gas emissions from the sector, but smaller amounts of CH₄ and nitrous oxide N₂O are also <span>emitted
</span><span>
2- </span>Global temperatures rise.
Temperatures measured on land and at sea for more than a century show that Earth's globally averaged surface temperature is rising<span>.
</span><span>
3- </span>Snow and ice melt.
If the surface temperatures warm above 32°, the snow and ice touching the surface will warm and begin to melt<span>.
</span><span>
4- </span>Sea levels rise.
When sea levels rise<span> rapidly, as they have been doing, even a small increase can have devastating effects on coastal habitats.</span>
Answer:
D
Explanation:
The identity of an atom is based on the number of proton
