Question

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Answer 1

Answer:

12)A nephron is the filtration unit of the kidney.It contains of a tubule which is connected with collecting duct at one end and a cup-shaped structure at the other end.This filtrate contains glucose,amino acids,urea,uric acid,salts and a major amount of water.

15)DNA copying is an essential part of the reproduction process because an organisms entire genetic information is contained within the DNA. If the DNA mutates,then there is a chance that the resulting organism may be born with a deformity or other genetic abnormality.

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Answer 2

• describe the structure and functioning of nephrons
• A nephron is the filtration unit of the kidney. It consists of a tubule which is connected with collecting duct at one end and a cup-shaped structure at the other end. This filtrate contains glucose, amino acids, urea, uric acid, salts and a major amount of water.(picture attached)

• draw a neat labelled diagram of sectional view of human heart
• picture attached

• what are the advantages of sexual reproduction over asexual reproduction
• In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population.The new formed individual has characteristics of both the parents.Variations are more viable in sexual mode than in asexual one.

• why is DNA copying and essential part of the process of reproduction
• DNA copying is an essential part of the reproduction process because an organism's entire genetic information is contained within the DNA. If the DNA mutates, then there is a chance that the resulting organism may be born with a deformity or other genetic abnormality.

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