Zygote and fecundation formation occur in these plants, Biology

Assignment Help:

Q. How do zygote and fecundation formation occur in these plants? Do these processes depend on water?

The microsporangia in the male strobile rupture at the right time of the year releasing thousands of pollen grains. As their pollen grains are "winged" they can be transported by the wind above distances. When the pollen grains fall keen on the female strobiles they enter the pollen chamber and pass the micropyle. This procedure is called as pollination.

Inside the pollen chamber the generative cell nucleus divides forming two gametic nuclei and the tube cell elongates forming the pollen tube. The pollen tube goes through the female gametophyte as well as the gametic nuclei (also known as sperm nuclei) pass through the tube; one of them unites with an oosphere (the female gamete) and forms the zygote (2n). Usually fecundation occurs one year after pollination and during this time interval the maturation of the male and of the female gametes takes place.

The fecundation inside these plants is independent from water. The gametophytes though are entirely dependent on the sporophyte (the adult plant) for nutrition and hydration.


Related Discussions:- Zygote and fecundation formation occur in these plants

Is glucose was the only source of fuel, What is the RQ if glucose was the o...

What is the RQ if glucose was the only source of fuel used in metabolism?

What is an illustration of gene control, Q. What is an illustration of gene...

Q. What is an illustration of gene control? An elegant instance of gene control in bacteria is operon system. A cluster of genes which is responsible for synthesizing a particu

What electrocardiogram results show a shortened qt interval, Electrocardiog...

Electrocardiogram results show a shortened QT interval and an increase in the P-R interval (i.e., decreased duration of action potential and decreased conduction velocity). Laborat

From which germ layer epidermis and nervous system originate, Q. From which...

Q. From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer? Epidermis and nervous system have the s

Mode of nutrition , What is the mode of nutrition in fish,human,amoeba,scor...

What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?

Types of forests - ecosystem, Types of Forests - Ecosystem The forest ...

Types of Forests - Ecosystem The forest biomes of the world have been classified into the three major categories: coniferous forest, tropical forest and temperate forest. C

Explain difference between an ecological niche and a habitat, What is the d...

What is the difference between an ecological niche and a habitat? An ecological place is a set of peculiar activities, resources and strategies that a species explores to repro

Determine the method of recombination, Which of the following is a false st...

Which of the following is a false statement regarding the method of recombination or crossing-over? A. Crossing-over takes place during prophase I of meiosis B. Recombinatio

Effects on materials - air pollutants, Effects on Materials - Air pollutant...

Effects on Materials - Air pollutants Most air pollutants are reactive chemicals, so they react with most of the substances around. You may recall from your chemistry lessons

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd