Epiboly - mechanism of gastrulation, Biology

Assignment Help:

EPIBOLY -

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

Related Discussions:- Epiboly - mechanism of gastrulation

Basic structural pattern of limbs, Basic structural pattern of limbs ...

Basic structural pattern of limbs The common structural pattern of tetrapod limbs is extremely clear expressed in their skeletal components and in the manner they are organiz

Determine the term - neuropsychological screening, Determine the term - neu...

Determine the term - neuropsychological screening examination A neuropsychological screening examination is a considerably abbreviated version of a full neuropsychological ass

Growing roots from different parts of plants, Growing roots from different ...

Growing roots from different parts of plants Secure a box of sand and place it away from direct sunlight. Wet the sand thoroughly and keep it moist. Plant the following thi

Explain phylum sarcdina, Phylum Sarcdina 1) They move by means of pseud...

Phylum Sarcdina 1) They move by means of pseudopodia (ralse feet) or similar structures. 2) They feed heterotrophically by phagocytosis. Some examples: Amoeba, Entamo

Define the elimination of vitamin e, Define the Elimination of Vitamin E? ...

Define the Elimination of Vitamin E? The primary oxidation product of α-tocopherol is α-tocophery quinone that can be conjugated to yield the glucuronate. This glucnronide is e

What do you mean by pericardial effusion, Q. What do you mean by Pericardia...

Q. What do you mean by Pericardial effusion? Collection of fluid in the pericardial sac is known as Pericardial effusion. All cases of pericarditis can lead to pericardial effu

Polyembryony, what are the types of polyembryony?

what are the types of polyembryony?

Purpose of supervision - management principles, Purpose of Supervision: ...

Purpose of Supervision: Purpose: To help the personnel to grow, to know themselves and what they need in order to render the most efficient service and to give them assistance

What is a species?, What is a species? The species is a set of living b...

What is a species? The species is a set of living beings able to cross among themselves generating fertile offspring. This concept though does not apply to individuals of ex

Pennetula, identifying characters of pennetula

identifying characters of pennetula

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages