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!
Secondary Egg Envelopes
These are secreted by oviducts and other accessory parts of genital organs while the egg is passing through them from ovary to the exterior.
a) In ovoviviparous sharks the egg is surrounded by a hard shell secreted by shell glands of the oviduct. The shell is drawn out as twisted horns which serve to entangle the egg among sea weeds.
b) In amphibians, the eggs are surrounded by a layer of jelly which protects the egg from adverse effects of sun rays, abrasion as well as from predators (because of its bad taste). The jelly absorbs water and swells.
c) In birds, reptiles and monotremes, the secondary envelopes include the white of egg surrounding the yolky ovum, followed by inner and outer shell membranes (which are in close contact with one another) and the outermost calcareous shell which is 'porous. The shell is elastic and compressible when the egg is laid but it hardens on exposure to atmosphere.
TYPES OF BLASTULA - Blastulas are of following type - 1 . STEREOBLASTULA - The blastocoel is very small. It's blastomere are less in num
At 1 AM, a healthy squid giant axon is placed in a bath of normal squid physiological extracellular saline and is internally perfused with normal squid intracellular saline. I
SIMILARITIE S BETWEEN APES AND MAN - Absence of tail. Broadened chest due to flattening of sternum Smaller lumber region due to reduced number of lumbar vertebrae
Q What are the kinds of reproduction that occur in fungi? In fungi there is sexual and asexual reproduction. Fungi reproduce asexually by fragmentation, sporulation and gemmati
Early campaigns of the 19th century that focused on sanitation, hygiene, housing, and nutrition had little effect in controlling communicable disease due to flawed rationale based
Mandibular Ramus Serves as an intraoral autogenous bone donor site. Cortical bone upto 4mm thickness may be harvested from the ramus. Harvest of bone from this area requires kn
What is eutrophication? Eutrophication is the process of excessive enhancing of nutrients, like phosphate and nitrate, in water because of direct deposit of non treated sewage.
define?
What are the plant hormones? The Plant hormones also called as phytohormones, are the substances that control the embryonic development and the growth of the adult plant.
CEL L BODY (= CYTON OR SOMA) OR PERIKARYON - It is nucleated & broader part of neuron. It may be up to 13.5 mm in diameter and may be irregular, spherical, oval, rounded
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