7. Write two importance of class pisces.​

As food

For controlling diseases

For scientific value

Any two importance of class Pisces are :

i) Fish can be eaten as food and it is an excellent source of protein, has very little fat,etc.

ii) The fish waste after the extraction of oil, is used as fertilizers.(fish manure)

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: