用“pollen grains”造句大全，pollen grains造句

Brown had noticed that tiny particles, such as those inside pollen grains, move haphazardly[ see box on opposite page].

The concept of containment is explored in pieces where the structure of shells, eggs, cells, pollen grains and seed pods is investigated.

pollen grains germinate directly on the stigma

Each lobe contains two pollen sacs that produce very large quantities of small pollen grains.

The mean number of pollen grains per stigma is 8—12 Most of the pollen grains are from self pollination. The pollen vigour is strong in the pollinating period.

The fine, powderlike material consisting of pollen grains that is produced by the anthers of seed plants.

2) The incidence of pollen grains abortion is 40.48±2.33%.

In 1827, upon observing a suspension of pollen grains in water, he discovered BROWNIAN MOTION.

There are many shriveled pollen grains in cultivar Premier that of 80% indicate shriveled type, perhaps that related with their sterility.

Their sterility showed no pollen grains, anther could not been shed, anther couldn't shed pollen.

Studies on the Relationship between the Sterility in Wheat Caused by Copper Deficiency and the Starch Accumulation in the pollen grains

Morphological chracters of pollen grains of diploid, triploid and te-traploid sugarbeets were examined by scanning electron Microscope( SEM).

Both the pollen grains and the gynoecia are active.

The results from the pollen densitometers indicate the number of pollen grains sucked into a device per square millimeter of the aperture.