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Nataly [62]
3 years ago
11

Name the main chemical responsible for pollen tube growth

Biology
2 answers:
Sati [7]3 years ago
7 0

Hello~

A pollen tube is a tubular structure produced by the male gametophyte of seed plants when it germinates. Pollen tube elongation is an integral stage in the plant life cycle. The pollen tube acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches (30 cm) to traverse the length of the pistil.

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BabaBlast [244]3 years ago
5 0

Answer:

Explanation:

Pollen tubes are produced by the male gametophytes of seed plants. Pollen tubes act as conduits to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms.

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Answer:

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Explanation:

According to this question, a material was cooled from 100ºC to 40ºC.

The temperature change, which is symbolized by ∆T = final temperature - initial temperature

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In this question, T2 = 40°C, T1 = 100°C

Hence, ∆T = 40°C - 100°C

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