3.
Mention two identifying characteristics of Gymnosperm. Write the name of the phylum to
which the animals having the following characteristics belong - Cnidoblast cell, Comb plate,
Tube feet.
4.
Mention the location and two roles of spleen in human body. Determine the importance of
centrosome in animal cell division.
Answers
Answer:
Gymnosperms are a group of plants with the following unique characteristics:
They do not have an outer covering or shell around their seeds.
They do not produce flowers.
They do not produce fruits.
They are pollinated by the wind.
Your spleen is an organ above your stomach and under your ribs on your left side. It is about as big as your fist. The spleen is part of your lymphatic system, which fights infection and keeps your body fluids in balance. It contains white blood cells that fight germs. Your spleen also helps control the amount of blood in your body, and destroys old and damaged cells.
Certain diseases might cause your spleen to swell. You can also damage or rupture your spleen in an injury, especially if it is already swollen. If your spleen is too damaged, you might need surgery to remove it. You can live without a spleen. Other organs, such as your liver, will take over some of the spleen's work. Without a spleen, however, your body will lose some of its ability to fight infections.