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Tom [10]
3 years ago
7

Do you think that all pollen germinates indiscriminately on all stigmas?

Biology
1 answer:
r-ruslan [8.4K]3 years ago
4 0
Pollen tube growth is one of the most fascinating—and essential—phenomena in the life cycle of flowering plants. After a compatible interaction between pollen grains and the stigma surface, the pollen germinates and forms the pollen tube, which grows through the stigma, style, and transmitting tract to deliver the sperm cells to the ovule." 
2) Although pollens of many species germinate in simple aqueous media, stigmas do not provide satisfactory sites for the germination of most foreign pollen... Stigmas not only provide the proper conditions for the germination of pollen from their particular species, they actively inhibit the germination of pollen of many unrelated species.
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Which of the following statements about energy is TRUE? Question 17 options: It can be used over and over again. It tends to be
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<h2>Energy </h2>

Explanation:

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3 years ago
A clock that sets five minutes fast is less than an identical clock that keeps correct time
Dafna1 [17]

Answer:

false!

Explanation:

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konstantin123 [22]

Answer:

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Which geological feature is most common at oceanic-continental convergent boundaries?
alex41 [277]

Trenches are geological feature is most common at oceanic-continental convergent boundaries.

Explanation:

Usually, the oceanic plate, because it is denser, becomes subducted underneath the continental plate. The enormous stress of the two colliding plates causes the plates to warp abit downwards along the boundary causing a trench to form that stretches the boundary.

As the oceanic plate gets subducted and ‘dives’ into the mantle, it begins to melt into magma. Usually, due to the enormous stress along the boundary, fissures develop on teh continental plate along teh boundary. The magma rises through these fissures and erupts at the surface. Several mountains form long the boundary forming another signature geological feature of convergent boundary which is volcanic arc mountains.

Learn More:

For more on geological features of tectonic plate boundaries check out;

brainly.com/question/11726099

brainly.com/question/2011799

#LearnWithBrainly

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