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!
Obturator - Ovule
An obturator is an outgrowth of the placenta or funicle or integument or style near the micropyle. It is presumed to guide the pollen tube to the micropyle. This tissue is either composed of thin-walled compact tissue or it is made up of loose hairy outgrowths. The cells of the obturator at the ultra structural level, show dense cytoplasm containing a copious number of ER, dictyosomes, and vesicles. The cells of the obturator produce a surface exudate and provide mechanical and chemical guidance to the growing pollen tube.
Figure: Obturator in Tetragonia tetragonioides
In this section you will be introduced to a variant of Darwinian concept of natural selection which he termed sexual selection. You may have observed very distinct and striking dif
Why is quarrantine a must before introduction of a plant species from a dissimilar country? a) What is meant by apoplast pathway? Why does it occur in cortex and not in endoder
Which of the following best explains mechanisms by which histones interact with DNA? A. Histone core proteins interact with the main groove of DNA by the helix-turn-helix-turn
NUCLEOLUS Discovered by Fontana and name given by Bowman. It is naked structure that is attached to chromatin at specific point called nucleolar organiser region or
These labs discuss the principle of osmolarity, which is defined as the total number of solute particles in 1 L of solution. Is this the same thing as tonicity? Explain your answer
Signify the term - Analogy, Analogous? Refers to structures that do not have the same evolutionary origin but have the same functions. The wings of a bat and insect are analogo
A wild-type strain of haploid yeast is crossed to a mutant haploid strain to make a diploid. What phenotypic ratios will be observed in the haploid progeny of the diploid?
Hemicryptophytes - Classes of Life Form In this case the perennating buds or organs are situated at the soil surface where they are protected by soil and fallen leaves. These
Explain Flucytosine Flucytosine (Ancobon) - Potentially lethal, dose-related bone mar- row toxicity, colitis and rapid development of resistance when used alone limit the use o
Porifera - Regeneration in Invertebrates Sponges have immense regenerating ability and show two ways of doing so as displayed below. : (a) Regeneration from small segments-
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