Egg envelopes, Biology

Assignment Help:

Egg Envelopes

Like any other cell, all the eggs are covered by the cell membrane or plasmalemma It is with two layers of about 50 A? (unit membrane) separated by a gap of 60 A?. In addition to plasmalemma, the eggs of practically all animals are surrounded by special egg envelopes (or egg membranes).

Based on their origin, types of egg envelopes are

  • Primary or
  • Secondary ones.

Related Discussions:- Egg envelopes

Hemiplegic migraine and ophthalmologic migraine, Hemiplegic migraine and op...

Hemiplegic migraine and ophthalmologic migraine These are relatively rare and include loss of movement of the limbs and eyes, respectively.

Need help, Many endangered plant species are currently being propagated by ...

Many endangered plant species are currently being propagated by commercial growers and botanical gardens and the sold (as both plants and seeds) to government agencies. Conservatio

Rabies, Rabies Rabies, a fatal zoonotic viral disease of dogs, cats, m...

Rabies Rabies, a fatal zoonotic viral disease of dogs, cats, man and other mammals, causes an acute encephalomyelitis. The rabies virus belongs to the genus Lyssavirus in the

Foot as burrowing organ, Foot as Burrowing Organ The Scaphopoda that ...

Foot as Burrowing Organ The Scaphopoda that usually have burrowing habit, possess foot suitably modified for burrowing purpose. The conical and protrusible foot of Dentalium

Explain the structure of a human sperm, (a) Explain the structure of a hum...

(a) Explain the structure of a human sperm. (b) Give a schematic representation showing the events of Spermatogeninesis in human male.

What are the pupillary defects, What are the Pupillary defects There ar...

What are the Pupillary defects There are certain deviations  from normal pupillary reflexes which point towards certain specific pathology.

How cultural practices are effective at limiting disease, Give two cultural...

Give two cultural practices (not chemical) you could use to control black spot of rose. Based on your current knowledge of the disease triangle, why do you think these cultural pra

Explain the ebb-phase of stress response, Explain the Ebb-Phase of Stress R...

Explain the Ebb-Phase of Stress Response? This occurs immediately following injury and lasts for approximately 24-hours. The so-called ebb phase, which is the early phase of th

What is the spontaneous generation hypothesis, What is the spontaneous gene...

What is the spontaneous generation hypothesis? The impulsive generation abiogenesis or hypothesys asserts that life on earth has come from nonliving material. For instance, t

Explain pea plants in genetics, Explain pea plants in genetics? Pea Pl...

Explain pea plants in genetics? Pea Plants :   In pea plants, sperm are located in the pollen grains produced by the anthers of the flower. Eggs are formed in ovules, structur

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