Planes of cleavage, Biology

Assignment Help:

Planes of Cleavage

The ova of most of the animal groups (except some specific cases like insects) are spherical or nearly spherical having their own actual centre comparable to earth shape. Similar to north and south poles on earth, the egg has animal and vegetal poles. The yolk platelets have more density than active cytoplasm and are concentrated more towards vegetal hemisphere. Therefore, when the egg lies in any fluid medium (the fundamental feature of most of the eggs even in the apparently terrestrial eggs like those of birds etc.), the vegetal pole tends to face the centre of gravity and animal pole away from it.


Related Discussions:- Planes of cleavage

Cell organelle that is specializing in aerobic respiration, Q. Which is the...

Q. Which is the cell organelle that is specializing in aerobic respiration? The mitochondria are cell organelles that are specialized in aerobic respiration. Q. Of which ma

Define requirements of protein during surgery, Define Requirements of Prote...

Define Requirements of Protein during Surgery? Negative nitrogen balance is the most common nutritional deficiency related to surgery. Reserves of protein in the tissues and pl

Which forms the inner walls of blood vessels, The kind of epithelium which ...

The kind of epithelium which forms the inner walls of blood vessels is : 1. cuboidal epithelium 2. columnar epithelium 3. ciliated columnar epithelium 4. squamous epith

What is the auditory tube and its function, Q. What is the auditory tube an...

Q. What is the auditory tube and its function? Auditory tube (Eustachian tube) connects each middle ear to the throat. This tube conducts air between tympanic cavity and outsid

Explain adverse effects of interferon alfa, Adverse Effects Of interferon a...

Adverse Effects Of interferon alfa Intramuscular or subcutaneous injection of interferon is commonly associated with an influenza-like syndrome, especially during the first wee

Express the answer as a whole number, Two true-breeding pea plants were cro...

Two true-breeding pea plants were crossed. One parent is round, terminal, and violet, constricted, while the other expresses the respective contrasting phenotypes of wrinkled, axia

Explain the health benefits of polyphenols, Explain the Health Benefits of ...

Explain the Health Benefits of Polyphenols ? Various health benefits have been attributed to polyphenols. These include: - anti-microbial - anti-viral - anti-oxidant - hy

St. jude medical valve--types of valves, St. Jude Medical Valve (SJM) :  ...

St. Jude Medical Valve (SJM) :  This is a low profile bi-leaflet valve, which was introduced in 1977. The leaflets and the housing are made of pyrolitic carbon. The currently

Oxidation of malate to oxaloacetate, Oxidation of malate to oxaloacetate ...

Oxidation of malate to oxaloacetate Oxidation of malate to oxaloacetate: Malate  is oxidized to oxaloacetate  by malate dehydrogenase and NAD'  is  required as coenzyme.  Thi

Determine about the term - heterogeneous mixture, Determine about the term ...

Determine about the term - heterogeneous mixture The solid phase made up of soil and other source material for nutrients, is a heterogeneous mixture. Each nutrient source contr

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