Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Formation of Vegetative and Generative Cells
The division of a pollen grain results in two unequal cells-the vegetative cell and the generative cell. The pollen grain is hereafter known as the male gametophyte because both the cells of this structure carry a single set of chromosomes. Do you recall that gametophyte represents the haploid generation of the life cycle of plant? The larger cell is the vegetative cell and it forms the pollen tube. The smaller cell is known as the generative cell and it produces two sperms by a mitotic division. The position of the generative cell is related to that of the microspore nucleus and the orientation of the spindle. In Figure that before division the pollen nucleus migrates to one side of the pollen grain and comes to rest near the wall. The division involves the formation of an unusual spindle structure.
Figure: Formation of Vegetative and Generative Cells
In many tests it is acceptable to read a positive result before the incubation time is completed. why is this not the case with starch agar?
deatiel
QUESTIONS: Write an analysis of the Chapter Twelve, the concluding chapter in ROLL AWAY THE STONE. It will be worth UP TO 50 points if you do it well. Submit it through the "Ex
adaptations
Diagrammatic representation of Implant placement Implant placementIt is located directly apical to the tooth it is replacing and not in an embrasure space. The angulati
Q. What is the relationship between environmental resistance and the population growth according to the biotic potential curve and the real population growth curve? The differe
Define Methods of Estimation of Ascorbic Acid (Vitamin C)? Ascorbic acid is also known as vitamin C which is a water soluble vitamin. As you already know, vitamins are a group
How to increase in the amount of glucokinase in liver Consumption of a meal rich in carbohydrate or administration of insulin initiate an increase in the amount of glucokin
Figure shows the flow of energy through the trees in a forest ecosystem.The numbers represent inputs and outputs of energy in kilojoules per m 2 per year. (a) (i) On Figure,
What are some fungal diseases transmitted by animal feces? Bat and pigeon feces can carry Histoplasma capsulatum, the fungus agent of histoplasmosis. The infection is transmitt
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd