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!
Spermatophores
Many non-chordates do not release free sperms during copulation. They have a mechanism to bundle and enclose a number of sperms in a sheath usually made of gelatinous material. Such bodies are called spermatophores. Most insects, the centipedes and certain molluscs produce spermatophores. Male centipede emits spermatophores and places it on a web already made. The female picks up the spermatophores and takes it into her genital opening. In many male cephalopods such as Loligo and Argonauta one of the arms gets specialised for the transfer of spermatophore into the females. Such an arm is called hectocotylized arm. The spermatophore, after having been deposited in the female, finally releases the sperms which move into the female ducts or the spermathaca.
Define the effect of niacin deficiency on Nervous System? Delirium is the most common -mental disturbance in acute pellagra. Dementia is more frequently seen in the chronic cas
Which of the following pairs of functional groups CANNOT react with each other by a dehydration reaction? Select one: a. Carboxyl;Hydroxyl b. Carboxyl;Sulfhydryl c. Pho
questions and answers on human impacts on environment
Q. What are the substances that are constitute the chromatin? What is the difference between chromosome and chromatin? The chromatin, dispersed in the nucleus, is a set of fila
Induction of disease resistance in plants by heat-shock The fungus Cladosporium cucumerinum infects cucumber and causes disease in the plant. However, if seedling of cucumber
Q. What is the importance of iron in diet? What is the disease caused by iron deficiency? Iron acts as a constituent of the hemoglobin molecule and of enzymes of the energetic
In a follow up to Alfred Sturtevant's studies on recombination in the fruit fly, Seymour Benzer used complementation studies of bacteriophage mutants to verify where recombination
Q. Carbohydrate requirement during congestive cardiac failure? While the quantity of carbohydrate remains almost the same as per the RDI i. e, 60% of the total energy, the qual
Life cycle of malarial parasite When the mosquito sucks the blood, gametocytes enter its digestive system. They migrate into the walls of the digestive system and undergo
DISORDER OF SKELETON AND JOINTS - 1 . Sprain - It involves a stretching or tearing of tendons or ligaments. 2. Arthritis - It is infalmation of joints.
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