Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Mating and Fertilisation
In all animals sperms are motile and have to move and seek the eggs to fertilise them. For this an aqueous environment is necessary. This need of a liquid medium has led to two basic mating patterns.
1. External fertilisation - mating partners come in close proximity in water and concurrently shed their eggs and sperms in water.
2 Internal fertilisation - mating partners come into physical contact and copulate, in which the male transfers the sperms directly into the reproductive ducts of the female. The ova coming down the ducts obtain fertilized. Internal fertilisation is characteristic of terrestrial animals, but as well occurs in several aquatic forms. Internal fertilisation usually leads to development of an intromittent organ or penis in the male partner. A range of such copulatory organs are found in non-chordates, such as like dates there are spermathecae for storing sperms received during mating. As the eggs pass down the ducts sperms are released from the spermathaca to feitilise them. Honey bee queen mates just one time when it receives enough sperms to fertilise the many thousands of eggs she is going to lay in 4-5 years of reproductive life.
Q. Important conditions for malabsorption syndrome? Let us now discuss a few important conditions grouped collectively under the term of malabsorption syndrome. These are:
The vagus gives of one superior cervical cardiac branch and an inferior cervical cardiac branch in the neck. These branches descend into the thorax and take part in performing the
Definition of Epileptic seizures Epileptic seizures are classified as symptomatic seizures if they can be identified with a specific cause, such as infection, trauma, tumor, va
Locomotion in Arthropoda The Arthropods are characterized by the existence of some special features which can be considered key to their success. These involve a rigid exoske
Q. Define Pacinian corpuscules? Pacinian corpuscules are an example of sensory receptors scattered deep in the subcutaneous tissue underlying skin or in viscera. These mech
Q. How do kidneys participate in the regulation of the acid-basic equilibrium of the body? How are alkalosis and acidosis respectively corrected by the kidneys? Kidneys can reg
Demography : This is the study of populations. In the other words demography is the statistical study of human population. This may be a very general science which can be applied t
Explain the Cardiovascular disease and stroke? Obesity may be an independent risk factor for coronary heart disease (CHD) with the degree of obesity being directly proportional
AGA R - AGAR It is cell wall mucopolysaccharide of some red algae (e.g. Gelidium, Gelidiella, Gracillaria). Agar is used as culture medium, thickener, stabilizer and as lax
How to increase in the amount of glucokinase in liver Consumption of a meal rich in carbohydrate or administration of insulin initiate an increase in the amount of glucokin
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd