Q.5) What is excretion?
Q.6) Give function of DNA.
Q.7) What is meant by 'chromosome' Explain its types.
Q.8) Distinguish between Prokaryotic cell and Eukaryotic cell
Q.9) Which components bring about important processes in the living
organisms.
Q.10) Which is the smallest structural and functional unit of the body of
living organisms?
Q.11) What keeps the various organs and organ systems separate from
each other?
biketan AC
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Q.12) What is meant by a light year?
0.13 What is the difference between the sky and space?
Q.14) What is meant by space - observation?
Q.15) Which satellites are responsible for telephone, television and
internet services in our country?
Answers
Explanation:
1) the removal of waste material or nitrogenous waste from the body is known as excretion
2) DNA is responsible for all the information. As it has genes.
3) chromosome consists of DNA and protein(histone) which means it has all the information to carry out any activity in a cell. it has four types : metacentric,sub-metacentric, telocentric and acrocentric.
4) eukaryote has a definite nucleus, prokaryote has not. eukaryote cell has membrane bounded organelles, prokaryote does not have those. The size of eukaryotic ribosome is 80s whereas prokaryotic cell has 70s ribosome. eukaryote cell has a nucleus with chromosomes enclosed by a nuclear membrane, prokaryotes have their chromatin dispersed in cytoplasm.
5)
6) cell
7) tissues
8) it is a unit of distance. 1 light year = 9.5×10¹⁵m
9)sky is Earth's atmosphere, space is vacuum.
10)
11)