<span>Brain is protected by bony skull and a liquid called the spinal fluid. The fluid acts as a cushion between brain and skull. It is a clear, colorless body fluid found in the brain and spinal cord. it is produced in the choroid plexuses of the ventricles of the brain, and absorbed in the arachnoid granulations.The spinal fluid occupies the subarachnoid space (between the arachnoid mater and the pia meter) and the ventricular system around and inside the brain and spinal cord.</span>
Answer:
The function of the pollen tube is to lead sperm cells into the ovary.
Explanation:
In angiosperms, the pollen tube is a structure formed when the pollen grain comes into contact with the stigma and germinates, producing a tubal extension that is related to the embryonic sac where the female gametophyte is found.
The function of the pollen tube is to conduct the male gametophyte —which is found in the pollen— to the embryonic sac, in order to come into contact with the oosphere and produce fertilization.
The other options are not correct because the pollen tube:
- <em>Do </em><u><em>not create more pollen</em></u><em>.
</em>
- <em>Do </em><u><em>not create more male spermatophytes</em></u><em>.
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- <u><em>Does not lead the eggs to the male spermatophytes</em></u><em>.</em>
The answer to your question is Competition
Sorry if I’m wrong
The particle size is important because the more finely divided the solid is , the faster the reaction happen. A powdered solid will normally produce a faster reaction because it has greater surface area than the single lump
Hope this helps
