How is the gymnosperm seeds formed, Biology

Assignment Help:

Q. How is the gymnosperm seeds formed? What are the ploidies of the structures that compose the seeds?

Their seeds are produced from differentiation of the megasporangia in the female strobiles (cones). Subsequent to an oosphere is fecundated the female gametophyte originates the haploid (n) primary endosperm (nutritive tissue that covers the embryo) and the covering of the megasporangium turns into the diploid (2n) seed shell.


Related Discussions:- How is the gymnosperm seeds formed

What do you mean by uricotelic and ureotelic excretions, Q Comparing toxici...

Q Comparing toxicity and the need for dilution in water how different are the uricotelic and ureotelic excretions? What are some examples of animals that present these respective t

Difference between phanerogamic and cryptogamic plants, Q. What is the diff...

Q. What is the difference between phanerogamic and cryptogamic plants? Cryptogamic (hidden sex organs) plants are those that do not present seeds or flowers. They comprise the

Describe the term - intellectual processes scales, Describe the term - Inte...

Describe the term - Intellectual Processes scales The 269 items are divided into 11 content scales, each of which may be administered individually. Since these scales contain v

Describe atg or aug, ATG or AUG: The codon for the methionine; the transla...

ATG or AUG: The codon for the methionine; the translation initiation codon. generally, protein translation can only start at the methionine codon (although this codon might be fou

Hormones secreted by adrenal gland, Hormone s . Cortical steroids (cortico...

Hormone s . Cortical steroids (corticoids-hormones of adrenal cortex) are grouped into three catagories : mineralocorticoids, glucocorticoids and gonadocorticoids. (i) Mine

Define errors of number of sex chromosomes of an individual, What are the m...

What are the main diseases caused by errors of the number of sex chromosomes in the cells of an individual? Diseases caused by the abnormal number of sex chromosomes are called

Explain the term light reflex - neuronal pathways, Explain the term Light r...

Explain the term Light reflex - Neuronal pathways The neuronal pathway for light reflex can be afferent and efferent. In the afferent pathway, the pupillary fibres begin in the

Modification of performance traits, M o dification of performance traits ...

M o dification of performance traits Modifications to livestock that could influence traits such as growth rate, feed efficiency and meat quality are major goals for livestoc

Heat-shock response, Heat-shock Response When growing plantlets or tis...

Heat-shock Response When growing plantlets or tissues of plants are shifted to 42°C and above, the synthesis of normal proteins rapidly declines and instead a set of new prote

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd