List of top Biology Questions on Pre-Fertilisation: Structures And Events

Which of the following statements about pollen grains is incorrect?
which layer of microsporangium nourishes the developing pollen grains ?
In Vallisneria, the pollination is carried by :
How many microsporangia are located at the corners of a typical bilobed anther of angiosperm?

Diadelphous stamens are found in:

Consider the following statements $\&$ choose the correct answer from the given options. Statement 1: Innermost layer of microsporangium is tapetum. Statement 2: Cells of tapetum possess dense cytoplasm more than one nucleus and nourishes developing pollen grains.
Testa and Tegmen of the seed coat represent
The movement of Pollen tube is:
Pollen kitt is present in
When pollen grain is shed at 3-celled stage, name the cells it contains.
Seed formation without fertilization in following plants involves the process of
The 2000 year old seed excavated from King Herod's palace at dead sea belong to
Outbreeding is an important strategy of animal husbandry because it
Pollination in Rafflesia is occurred by
Transfer of pollen grains from the anther to the stigma of another flower of the different plant is known as
Which one of the following shows heterothallism?
Megasporangium is equivalent to
Number of meiotic divisions necessary to produce 100 seeds in cyperus is
Sporpollenin is formed by polymerization of
The innermost wall layer of microsporangium nourishing the developing pollen grains is known as
Sporopollenin, an organic material is present in
The following is the diagram of T.S. of Anther. Identify the parts labelled A, B, C.
What is the characteristic of tapetum ?
Ovule is attached to the placenta of ovary wall by
The ovary is half inferior in flower of :