Scheme of classification of phylum hemichordate, Biology

Assignment Help:

Q. Scheme of Classification of phylum hemichordate?

These are about 90 species of hemichordates. All are marine and live in the open sea or in muddy sediments. Hemichordata were once included in the phylum Chordata and were grouped as invertebrate (backboneless) chordates under 'protochordates' (first chordates). They have a dorsal nerve cord, often hollow, developed from the dorsal epidermis. The longitudinal stiffening stomatochord is no more thought to be the homologue of the notochord and this distinction justified the separation of the hernichordata from the chordata.


Related Discussions:- Scheme of classification of phylum hemichordate

#virus, how do viruses reproduce

how do viruses reproduce

What are the structures that form the external ear, Q. What are the structu...

Q. What are the structures that form the external ear? What is its function? The internal ear comprises the auricle or pinna and the auditory canal its function is to conduct t

Define criteria for assessment of riboflavin status, Define Criteria for As...

Define Criteria for Assessment of Riboflavin Status? Riboflavin status can be assessed by measuring urinary excretion of the vitamin in fasting, random, and 24-hour specimens o

Define factor contribute to malabsorption - radiation damage, Define Factor...

Define Factors Contribute to the Malabsorption - Radiation Damage? Malabsorption of water, fats, bile salts, carbohydrates, calcium, magnesium, iron and vitamin B 12 occur dur

Explain the parts of the microscope, Explain the Parts of the Microscope? ...

Explain the Parts of the Microscope? Microscope, as you may have noticed in Figure or for that matter even seen in a laboratory, is a metal body composed of a base and an arm t

Define the role of vitamin a in immune response, Define the Role of Vitamin...

Define the Role of Vitamin A in immune response? Vitamins A is essential to normal immune function and- regulation. As discussed above, during vitamin A deficiency the goblet c

Aplastic anaemia, Aplastic Anaemia   Aplastic anaemia is a condition in...

Aplastic Anaemia   Aplastic anaemia is a condition in which production of red cells in the bone marrow is reduced. It involves failure to produce adequate red cells, white cell

Chest x-ray, Increase in cardio-thoracic ratio is a relatively specific ind...

Increase in cardio-thoracic ratio is a relatively specific indicator of left ventricular end-diastolic volume. Left atrial enlargement is seen as double density shadow, lifting up

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