Zygote - embryogenesis, Biology

Assignment Help:

Zygote - Embryogenesis

The fertilized egg or zygote is situated at the micropylar end/pole of the embryo sac, its basal (micropylar) end is attached to the embryo sac wall and apical (chalazal) part projects into the central cell. The zygote usually undergoes a period of rest during which it shrinks. This resting period of the zygote varies with different species and is to some extent dependent on environmental conditions e.g. in Theobroma cacao the zygote divides 14 to 15 days after fertilization, in Oryza saliva zygote divides about 6 hours after fertilization.

A complete cell wall is formed around the zygote. (You would dl that the egg has only plasmalemma and no wall at its apical part). A TEM picture shows that zygote cytoplasm show a more polarized appearance and that is the two poles appear different, micropylar part is vacuolate and chalazal part with a prominent nucleus.


Related Discussions:- Zygote - embryogenesis

Name the molecule that donates hydrogen for photosynthesis, In sulfur photo...

In sulfur photosynthetic bacteria what is the molecule that donates hydrogen for photosynthesis? In sulfur photosynthetic bacteria the substance that donates hydrogen is hydrog

ORGANIC MANUres, why manures are better than fertilizers

why manures are better than fertilizers

Define the prevalence and incidence of bulimia nervosa, Define the Prevalen...

Define the Prevalence and Incidence of bulimia nervosa? Bulimia nervosa appears to have become more prevalent during the past 30 years. We do not have much data on Indian popul

Probation/parole client , Write a report on a special probation/parole clie...

Write a report on a special probation/parole client and programs that have been situated to address this problem client. Focus on 1type of special requires offender (substance abus

Explain acid butt - carbohydrate utilization pattern test, Acid butt - carb...

Acid butt - carbohydrate utilization pattern test ? Acid butt (yellow) and acid slant (yellow) with or without gas production – Glucose along with lactose and/or sucrose, is deg

#title, WHAT IS THE FUNCTION OF CELL COAT

WHAT IS THE FUNCTION OF CELL COAT

Explain intraoral barrier techniques, Q. Explain Intraoral Barrier Techniqu...

Q. Explain Intraoral Barrier Techniques? Rubber dam A rubber dam is used whenever possible for improved vision and access and to reduce dental personnels' exposure to micr

Explain about the gelation, Explain about the Gelation? Gelation refers...

Explain about the Gelation? Gelation refers to the process where denatured molecules aggregate to form an ordered protein network. Proteins can form a well-ordered gel matrix b

Carrier ions like na+ facilitate the absorption of substance, Carrier ions ...

Carrier ions like Na+ facilitate the absorption of substances like: 1. amino acids and glucose 2. glucose and fatty acids 3. fatty acids and glycerol 4. fructose and so

Agro industrial-biological evaluation of feedstuff, Biological evaluation ...

Biological evaluation A small livestock unit if attached with a mill will be of immense help. Since inspite analyzing for various mycotoxins still we face some problems, at lea

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