What are Pollen Grains? Pollen grains are microscopic structures, which bear androecium – a male reproductive organ of a flower. The interior section of pollen grain contains cytoplasm along with the tube cell, which converts into a pollen tube and the generative cell releases the sperm nuclei.
The electrons in the outermost shell of an atom are called valence electrons.
For elements having one to four valence electrons, valency = valence electrons. For elements having five to seven valence electrons, valency = (8-valence electrons).
Answers & Comments
Explanation:
What are Pollen Grains? Pollen grains are microscopic structures, which bear androecium – a male reproductive organ of a flower. The interior section of pollen grain contains cytoplasm along with the tube cell, which converts into a pollen tube and the generative cell releases the sperm nuclei.
Answer:
The electrons in the outermost shell of an atom are called valence electrons.