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!
Copulation and Fertilisation in Hermaphrodites
Copulation between hermaphrodites is common. Flatworms possess a cirrus and penis that is inserted into the uterine vaginal opening of another worm. After copulation, the sperms are stored in a seminal receptacle. In earthworms, the genital papillae assist in mating, the sperms released from the male genital pore of one earthworm are received and stored in seminal receptacles (spermathecae) of another earthworm. Sperm transfer is thus mutual. Similarly cross fertilisation is possibly the rule in tapeworms when there are adjacent individuals inside the hosts gut, but self fertilisation among two different proglottids of the same tapeworm is as well known to occur. Majority of hermaphrodites tend to be protandrous that is male gonads maturing first, and this is a condition to ensure cross fertilisation. In protandrous hermaphrodites the gonads (testes and ovaries) may be separate organs and they mature at dissimilar times. In some rare cases as in certain gastropod molluscs there is a single gonad called ovotestis that produces both eggs and sperms. But the gonad first produces sperms and later the egg.
what does ICZN stand for
TYPES E.R. consists of two types - 1. Rough E.R. 2. Smooth E.R. R o ugh E.R. S m o o th E.R.
Chiasmata formation takes place where crossing over occurs. Here Chromatid segments are exchanged which contributes to genetic variability. The 46 homologous chromosomes arrange at
Class of Crustacea - Malacostraca Malacostraca involves most of the larger forms such as crabs, lobsters, shrimps etc. and constitute the majority of crustacean species. The c
Components of a Balanced Diet Food which we eat, has effect on the growth and development, and the maintenance of normal body functions. Hence, a good balanced diet is needed t
Define Liposuction - surgical management for obesity? Liposuction is a cosmetic surgical procedure different from bariatric surgery. It involves aspiration of subcutaneous fat
Determine the following term - Amniote egg Eggs that shelter the developing embryo in a water-filled sac—the amnion. Characteristic of the amniote animals, which include reptil
#question names of 10 zoo flagellates
Infective endocarditis (IE) is a microbial infection of the endothelial surface of the heart. The characteristic lesion, the vegetation, is a variably sized amorphous mass of plate
Define Development - Terminologies used in Chromatography? Development is the process of passing a mobile phase over the adsorbent or support. During the development the sample
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