Epiboly - mechanism of gastrulation, Biology

Assignment Help:

EPIBOLY -

  1. The epibolic movements occur only in the prospective ectodermal blastomeres.
  2. In the blastula of frog, migration and rearrangement of microceres over megameres is called epiboly.
  3. At one specific point micromeres do not cover megameres, this place is known as gastrulation slit.
  4. This slit is blastopore of future embryo. Formation of blastopores occurs in grey-crescent area.
  5. Some megameres start budding as result of this budding micromeres are formed.
  6. These micreomeres also cover the megameres. This process is known as Apiauxesic.
  7. Example - In the eggs of Ctenophora, Mollusca, Annelida

868_epiboly.png


Related Discussions:- Epiboly - mechanism of gastrulation

Genetics , write about complementary genes

write about complementary genes

Chances of hypothermia, Name two ways in which the chances of hypothermia c...

Name two ways in which the chances of hypothermia can be reduced during outdoor activities. Eating well before going out and wearing warm, wind-proof clothing can reduces the c

What is an effect of increased temperature, What is the effect of increased...

What is the effect of increased temperature on a non enzyme catalyzed reaction? What are the effects of increased temperature on an enzyme catalyzed reaction?

Physical lay out, Physical Lay Out: Physical lay out of the nursing un...

Physical Lay Out: Physical lay out of the nursing unit should be planned and built in such a manner so that it helps the head nurse to discharge her duties/carry  out her resp

Explain about the hypokalemia, Explain about the Hypokalemia? Normal s...

Explain about the Hypokalemia? Normal serum K ranges from 3.5-5 mM/L. Hypokalemia or low plasma K levels can occur with a net shift of K from the plasma to the cells. This shi

Explain quantitative methods - therapeutic diets, Quantitative Methods - Th...

Quantitative Methods - Therapeutic diets Quantitative Methods: These are often essential for constructing  Lherapeutic diets.  The  two ways by which  this could be done are as

Explain phylum chlorophyta, Phylum Chlorophyta (green algae) 1) The c...

Phylum Chlorophyta (green algae) 1) The chlorophyll is the main photosynthetic pigment. 2) There is little or no cell differention in thallus. Thallus is usually filamento

Arthropod classes characterized by number of limbs, Q. How are the three ma...

Q. How are the three major arthropod classes characterized according to the number of limbs? Most crustaceans have five pairs of limbs. Arachnids present four pairs and Insects

What are the values of dpd for plant cells under hypertonic, What are the v...

What are the values of DPD for plant cells under hypertonic, isotonic and hypotonic media? In plant cells under hypertonic medium there is loss of water for the exterior, SF >

Why water is considered a universal solvent, Water is considered a universa...

Water is considered a universal solvent because- Select one: a. it can dissolve polar and non-polar compounds b. it can dissolve both positively and negatively charged ion

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