It is false because the Doppler effect is something completely different <span />
Answer:
C
Explanation:
- The answer can't be A since a solid, liquid and gas can have the same color. For example you can take water. It exists in three phases ice, liquid and water vapour; they are all colorless.
- The arrangement and movements of the particles in the substance however is different in each. Particles in solid are put more closely together and held at fixed positions making them having higher density. Liquid particles are more further apart than solids and are able to move freely. Gas particles are more loose than solids and liquids allowing them to travel more faster. That is why you can smell a perfume even when it was sprayed far away.
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 atmosphere
Is not a reservoir for phosphorus.
