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!
Histogenesis and Organogenesis
After the octant stage numerous cell divisions occur in various planes. The proembryo become globular or bulb-shaped. As a general rule, some tangential divisions occur in the cells of the octant so that three cells layers are differentiated - the outer dermatogen which later forms the epidermal covering, middle periblem which gives rise to the cortex of the stem and root, and inner plerome that is responsible for the vascular tissue and pith. Such a process of differentiation of cell layers is termed Histogenesis.
Organogenesis or differentiation of the initials of various organs begins in the globular proembryo in such a way that cotyledons (which form the first leaves), epiphysis (which gives rise to the stem ex) and hypophysis (that forms the root cortex and cap) are produced. Since organogenesis differs in dicots and monocots, we may discuss this aspect separately for the two groups of angiosperms with the help of suitable examples.
Concept of Production - Ecosystems The ecosystems are unable to function, unless there is a constant input of energy from an external source that is sun. Solar energy enters t
Explain about Bone lining cells Bone lining cells are basically inactive osteoblasts (in terms of making bone) that line bone surfaces. Osteocytes are osteoblasts that have be
Water Loss - Plant Water Relation Plants lose about 98% of water to the atmosphere by transpiration. Often water loss by transpiration exceeds gain by absorption and results
What is the basic need for bone grafting The basic need for bone grafting includes situations like: 1. Implant site development- when the quantity of bone is deficient to s
PRINCIPLES OF CARDIOPULMONARY BYPASS MECHANISM (CPB) What is CPB? It is a technique by which the mechanical function of the heart and respiratory function of the lungs
RESPIR A T O R Y PIGMENTS - Resp. pig. is generally Hb (Fe is attached to globine by chellate bond). In Earthworm Erythroqruorine present. Haemocyanine (Cu) genera
Q. What is xaxim? Most pteridophytes have subterraneous stems similar to the substrate called as rhizomes. Xaxim is a kind of pteridophyte with an aerial stem in generally perp
Temperature - Aquatic Habitats The water temperature changes less rapidly than the temperature of air because water has a considerably higher specific heat than air, that is l
How do the availability of water and light and the climate affect the growth of a population? The availability of water and light and the climate are abiotic factors that limi
Dracunculiasis (guineaworm infestation) Dracunculiasis, a disease of man, which has been known since antiquity, is caused by the nematode parasite Dracunculus medinesis. The p
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