So white blood cell’s(WBCs for short) main job is to fight infections.
They do this by swallowing the infection.
You see,WBCs do not have a permanent shape.this means that they enlarge and decrease size of parts of their body.So they grow two long arm like structures called pseudopodia which swallow the infection.(pseudopodia means false feet).
You can see the process in the photo I attached from google
Number 4 the answer is 1
Number 6 the answer is 3
Hope this helps :)
By performing this dance, successful foragers can share, with other members of the colony<span>, information about the direction and distance to patches of flowers yielding nectar and pollen, to water sources, or to new nest-site locations.</span>
Answer: Peroxides degrade to form oxygen gas, water and foam.
Explanation:
A foam forms when bubbles of a gas are trapped in a liquid or solid. In this case oxygen is generated when hydrogen peroxide breaks down into oxygen and water on contact with catalase, an enzyme found in liver or kidney.