Characters of the hemichordata, Biology

Assignment Help:

Two typical characters of the Hemichordata that can be observed and used to identify them are:

i) Soft, worm-like or short unsegmented body.

ii) Body is divided into a (i) proboscis (ii) collar and (iii) trunk which are distinguishably visible.

Two more typical features can be seen only after dissecting a hemichordate. These are

i) A 'notochord' like projection at the anterior end. It is endodermal in origin and not a notochord (which is mesodermal in origin).

ii) An intra-epidermal nervous system.


Related Discussions:- Characters of the hemichordata

Vegetative development - growth, Vegetative Development - Growth It is...

Vegetative Development - Growth It is quantitative and irreversible change. It reflects an increase in size and volume of an organism. For example, the change in the size of a

How is hiv transmitted, Q. How is HIV transmitted? What is the disease caus...

Q. How is HIV transmitted? What is the disease caused by this virus? The HIV (human immunodeficiency virus) is supposed to be transmitted through blood, semen, vaginal secretio

What is the meaning of food exchanges, What is the meaning of Food Exchange...

What is the meaning of Food Exchanges Food exchanges mean grouping of foods in which the specified amount of all the food provides approximately equal amounts of carbohydrate,

What are the cells that produce the myelin sheath, Q. What are the cells th...

Q. What are the cells that produce the myelin sheath? Of which substance is the myelin sheath formed? In the central nervous system (CNS) the myelin sheath is made by appositio

Describe in detail - nacreous layer., Describe in detail - Nacreous layer. ...

Describe in detail - Nacreous layer. The innermost of the three layers of a mollusc shell. It is also referred to as mother-of-pearl, it comprises thin layers or calcium carbon

Explain in detail about respiratory system, Explain in details about Respir...

Explain in details about Respiratory system Respiratory system starts from nostrils through which we inhale air in the nasal cavity. Then, air enters pharynx and goes through l

Microfilaments - cytoskeletal structures, MICROFILAMENTS Discovered ...

MICROFILAMENTS Discovered by Pelvitz. These are smallest cell structure. These are non-living structures. These are solid structures, consists of actin protein (c

Use mathematical calculations to justify the answer, Using an average wavel...

Using an average wavelength of 450 nm (0.45 um) can you resolve two objects that sit greater than 200nm apart from one another? Use mathematical calculations to justify your answer

What are the typical features of mammals, Q What are the typical features o...

Q What are the typical features of mammals? The typical features of mammals are: body (less or more) covered with hair; presence of the diaphragm muscle that separates the thor

Cat scratch disease, Cat scratch disease It is caused by Bortenella he...

Cat scratch disease It is caused by Bortenella henselae, a gram-negative, non-motile bacterium. The organism is found in all parts of the world. The cat is an important reserv

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