Fecundation in angiosperms
After the pollination, explain how does the fecundation takes place within the angiosperms and whether fecundation depends upon the water?
Expert
After the pollination, one of sperm nuclei from the pollen tube joins the oosphere of embryonic sac making the diploid (2n) zygote. Other sperm nucleus fuses along with the polar nuclei of embryonic sac developing a triploid (3n) cell which through the mitosis will turn in the secondary endosperm of the seed. The antipodal cells and the synergids degenerate after the fecundation process completes. Fecundation within these plants is independent from the water.
How organism which had once undergone contact with an antigen can be immunized against the future infections by the same agent?
Although personality tends to be consistent and enduring, it may still change under certain circumstances. For instance, an individual's personality may be altered by major life events, such as the birth of a child, the death of a loved one, a divorce, or a major career promotion.
What do you mean by blind spot? Illustrate.
What are the limitations and precautions of De naturalizing proteins
Database Administration: It is a job whose primary function is the general support of a computer database. Such support tasks are executed by a person termed as a database administrator, or DBA. Databases need constant management and up-keep, and a DB
What is the other means for transport of substances in animals devoid of a circulatory system? Why is blood significant for bigger animals?
Phenyl ketonuria is autosomal recessive metabolic genetic disorder characterised by the mutation in the gene of hepatic enzyme phenylalanine hydroxylase,which is an important enzyme to metabolize phenylalanine and tyrosine.Mutation in this gene causes
What is heat of Combustion?
Briefly define cytoplasmic inclusions?
How do kidneys contribute in the regulation of acid-basic equilibrium of the body? How are acidosis and alkalosis correspondingly corrected by the kidneys?
18,76,764
1946070 Asked
3,689
Active Tutors
1434108
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!