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.
Q. What is biological control? The Biological control is a natural method to control the size of microorganism, animal or plant populations. The Biological control is based on
Define the HTST Pasteurization Method? Rapid, high pasteurization is characterized by a pasteurization time in the order of seconds and temperatures of about 85° to 90°C or mor
What is the system that permits movement and fixation to echinoderms? The system that allows movement and fixation to substrates in echinoderms is known as the ambulacral syste
The Upper Border of the Heart A: Mark a point on the lower border of the left second costal cartilage 1.2 cm away from the sternal margin. B: Mark a point on the upper bord
Explain History of Plant Classification - Ancient Greeks and Romans? Hippocrates, "The Father of Medicine" (460-377 B.C.) is reputed to have been one of Democritus 's disciples
What are universal donors and universal recipients concerning the ABO blood system? Universals donors of the ABO blood type system are the individuals of the type O. Type O blo
Patterns of Metamorphosis The pattern of metamorphosis is not the same in all insects and so metamorphosis can be broadly classified into 3 types: (1) Complete metamorphosi
What is population growth rate? Population growth rate (PGR) is the percent variation among the number of individuals in a population at two different times. Thus the populatio
SPERM A T OCY T OGENESIS In this process four spermatid develop from one PGC. (i) Multiplication phase The spermotogonia or sperm mother cells lie next to the b
Secondary Production - Ecosystem The net primary production is the only energy available to consumers or heterotrophs including man. Herbivores such as cow or deer gaze upon
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