Define class – arachnida, Biology

Assignment Help:

Define Class – Arachnida?

The class Arachnida (Arachnida = spider) has terrestrial and few aquatic animals. It
includes spider, scorpions and mites.

1. Prosoma bears. six pair of appendages: one pair of clielicerae, one pair of pedipalpi and four pairs of walking legs.
2. Abdomen is generally devoid of appendages.
3. Respiratory organs are tracheae, book lungs and book gills.
4. Excretion is performed by malpighian tubules and coxal glands.
5. Sexes are separate but sexual dimorphism is not conspicuous.

So, you have refreshed your background knowledge of1.he characters of subphylum Chelicerata and class Arachnida. Let us now study individuals examples under the class Arachnida.


Related Discussions:- Define class – arachnida

Describe briefly tyndall effect, Tyndall Effect One of the best ways to...

Tyndall Effect One of the best ways to distinguish a solution from a colloidal dispersion is to use a strong beam of intense light. As the beam passes through a colloidal dispe

Hydrophilicity plot, Hydrophilicity Plot is a computer plot which checks t...

Hydrophilicity Plot is a computer plot which checks the relative summed hyrophobicity or hydrophilicity of adjacent amino acid sidechains (usually within a moving window of about

How many layers in retina, How many Layers in retina The retina is comp...

How many Layers in retina The retina is composed of  ten  layers: a:)  Pigmented epithelium (outermost layer), b)  Neusoepithelium, rods and cones  (photoreceptors), c

What is embryogenesis explain in detail, What is Embryogenesis explain in d...

What is Embryogenesis explain in detail? Embryogenesis in humans consists of the first eight weeks of development of the zygote. Embryogenesis in animals is generally divided i

Name the serogroups of meningitidis, Serogroups  Five major serogroups ...

Serogroups  Five major serogroups of N. meningitidis, A, B, C, Y and W-135, cause most human infection. Serogroup A is the leading cause of disease in the "meningitis belt" acr

What is difficult breathing, What is difficult breathing? Difficult Bre...

What is difficult breathing? Difficult Breathing: Tachypnea (respiratory rates consistently more than 451 min), is a characteristic manifestation of heart failure in newborns (

What is aprecise diagnosis, Q. What is Aprecise diagnosis? Aprecise dia...

Q. What is Aprecise diagnosis? Aprecise diagnosis is necessary to establish the mode of therapy. Patients with initial blood phenylketonuria level of 121 m moll1 (> 2 mg/dl) sh

Ilustrate the nutritional and functional role of sodium, Minerals  :-  Sodi...

Minerals  :-  Sodium Food Source      NaCl, MSG, other food additives, milk, low in most raw foods Nutritional Functional role Essential nutrient: Deficiency is ra

Illustrate the types of Bone Remodeling, Illustrate the types of Bone Remod...

Illustrate the types of Bone Remodeling Bone remodeling occurs on existing bone surfaces. However, unlike modeling, remodeling cannot cause large changes in bone structure at a

Define role of buffer in electrophoresis, Define Role of Buffer in Electrop...

Define Role of Buffer in Electrophoresis? Buffer ions have a two-fold purpose in electrophoresis, they carry the applied current, and they fix the pH at which electrophoresis i

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