Diversity In Living Organisms — Science STD 9 — Question

Plant cell wall is mainly composed of ___________.

Ribosomes are concerned with the synthesis of _________.

Fill in the following blanks with suitable words: The particle which is formed by the loss or gain of electrons by an atom is called _________.

Fill in the following blanks with suitable words:
The particle which is formed by the gain of electrons by an atom is called _________.

Fill in the blanks in the following statements: The maximum number of electrons that can be accommodated in L shell are __________.

Fill in the following blanks with suitable word: The acceleration due to gravity on the moon is about ______ of that on the earth.

_________ epithelium occurs in the lining of renal tubules and ducts of salivary glands.

Fill in the following blanks with suitable word:
In order to sink in a fluid, the density of an object must be _____ than the ______ of the fluid.

Fill in the blanks. Bone possesses a hard matrix composed of _________ and __________ .

Name the organelles which show the analogy written as under Control room of the cell __