Pollen grains are produced by the male structure of the flower and pollen grains are produced in, specifically the anther of flower-bearing plants (angiosperms) or in the microsporangia of gymnosperms. The structure of pollen grain assists with their function. The function of the pollen grain ...
To solve the question of how many meiotic divisions are required to produce 102 pollen grains, we can follow these steps:1. Understand the Process of Pollen Grain Formation: - Pollen grains are produced from microspore mothe
There are 3 steps to solve this one. Solution 100% (2 ratings) Share Step 1 Introduction : Pollen is a powdery substance consisting of microscopic grains produced by the male re...View the full answer Step 2 Unlock Step 3 Unlock Answer Unlock...
Biosynthesis of a new plasma membrane to support pollen tube growth happens in the endoplasmic reticulum (ER), but the building blocks of this membrane, fatty acids (FAs), are produced in pollen plastids. The first step of FA biosynthesis is the conversion of acetyl-CoA into malonyl-CoA, cat...
2013. Pollen grains in honeys produced by Tetragonisca angustula (Latreille, 1811) (Hymenoptera: Apidae) in tropical semi-arid areas of north-eastern Brazil. ArthropodAPlant Interactions 7:619A632.Novais JS, Absy ML, Santos FAR. 2013 . Pollen grains in honeys produced by Tetragonisca angustula...
Small grains may be blo wn farther but they are also more prone to be whiskel d past the waiting stigma because smaller particles t end to stay trapped in the fast-mouing air that s around the stigma. But stigmas create turbulence which slows the air speed around them and may hel p ...
Juniperus pollen is highly allergenic and is produced in large quantities across Texas, Oklahoma, and New Mexico. The pollen negatively affects human populations adjacent to the trees, and since it can be transported hundreds of kilometers by the wind, it also affects people who are far from th...
a pollen grain is theoretically 100%, whereas all pollen grains are genetically identical. When recombination occurs, the heterozygosity transmitted by a pollen grain is lower, and the population of 2n pollen becomes much more heterogeneous. It can be expected that chromosome rearrangements due to ...
Pollen grains[主语]are subject to[谓语]potential hazards.[宾语] 分句-3 They[主语]are transported[谓语]over long distances.[状语] 分句-4 The amount of pollen[主语]is[系动词]one to three orders of magnitude greater[表语]than the amount produced by species pollinated by insects.[状语] ...
In other words, more offspring will be pro- duced in angiosperms if less recombination occurs in the microspore and more offspring will be produced in gymnosperms if less recombination occurs in the megaspore. Indeed, in gymnosperms, large amounts of pollen are produced but pollen grains do ...