News tagged with pollen
Related topics: allergy
Pollen
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells). Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants. When pollen lands on a compatible pistil or female cone (i.e., when pollination has occurred), it germinates and produces a pollen tube that transfers the sperm to the ovule (or female gametophyte). Individual pollen grains are small enough to require magnification to see detail.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Protect your kids from pollen allergies: expert
(HealthDay)—Many children suffer allergies at this time of year as trees and other plants start releasing pollens into the air. So parents need to monitor their youngsters for symptoms, an expert says.
Immunology
Apr 28, 2013 |
3 / 5 (4) |
1
