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!
Stored Metabolites - Seed and Fruit
In a large majority of seeds food is stored in the cells of the endosperm. In coconut, wheat and castor bean for example, it is the endosperm which stores the bulk of the food reserves. Food stored in endosperm is utilized by the embryo during development and seed germination. The endosperm is usually a triploid tissue derived from the fusion product of a male gamete (brought by pollen tube) and two polar nuclei in the central cell of the embryo sac. The endosperm surrounds the embryo all around and is ideal for nurturing the embryo till the seedling begins to photosynthesize and becomes antotrophic.
A second seat/site of nutritive tissue in some seeds is the perisperm, which represents the persisting nucellus. Nucellus is observed in some monocot families, such as the Zingiberaceae (to which turmeric and ginger belong), and a few dicotyledonous families, including the Piperaceae (e.g., black pepper) and the Nymphaeaceae (e.g., lotus). In Canna the chalazal cell of the ovule divides repeatedly to form a starch-containing tissue called chalazo sperm. Mature seeds containing persistent endosperm or perisperm are called albuminous and those lacking them exalbuminous.. Mature leguminous seeds lack endosperm. In pea, gram (chick pea) groundnut and a whole range of pulses the large cotyledons of the embryo take up the function of storage of food. In cotton seed also the large, lobed and folded cotyledons are the main repository of nutrients.
Organ level -Level of body organization When organs work together to perform a specific function we have the highest level of body organization i.e. the organ system level of bo
In which type of animals does the placenta exist? What is its main function? True placenta is present in placental mammals. The placenta is produced from the chorion of the
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy? 1. Fourth month 2. Fifth month 3. Sixth month
Are the xylem and the phloem made of living cells? The cells that constitute the xylem ducts are dead cells killed by lignin deposition. The cells of the phloem are living
The process by which gametes are produced in the gonads is known as gametogenesis. The process of formation of male gametes or sperm is known as spermatogenesis is of great sign
Acute Myocardial Infarction with Haemodynamic Deterioration : These patients may require urgent insertion of intra aortic balloon pump (IABP) followed by PTCA or surgery. 50 per
Define Classification of proteins on the basis of attributes? Besides classifying proteins on the basis of soluble and insoluble, proteins have been further classified based on
What are DNA ligases? How do these enzymes participate in the recombinant DNA technology? The DNA ligases are enzymes specialized in tying the complementary DNA chains that for
Q. What is the vena cava? Which type of blood circulates within the vena cava? The vena cava is either of two large veins that debouch into the right atrium the superior vena c
Determine Reagents for Determination of Protein Content Using Biuret Method? Collect the following reagents to conduct the experiment: 1. 0.2 N NaOH solution - Dissolve 8 g
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd