Q13 of 58 Page 1

What is multiple fission? How does it occur in an organism? Explain briefly. Name one organism which exhibits this type of reproduction.

Multiple fission is an asexual reproduction in which parent organism splits to form many new organisms at the same time.

Process—


a) Sometimes during unfavorable conditions, a protective wall or cyst is formed around the cell of a single celled organism.


b) Inside the cyst, the nucleus of the cell splits several times to form many smaller nuclei called daughter nuclei. Each nucleus gathers a bit of cytoplasm around itself, develops a membrane around each structure.


c) Thus many daughter cells develop which on liberation grow into adult organisms at the same time.


Plasmodium is a protozoan which reproduces by asexual method of multiple fission.


More from this chapter

All 58 →
10

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid element.

 11

What are the functions of testes in the human male reproductive system? Why are these located outside the abdominal cavity? Who is responsible for bringing about changes in appearance seen in boys at the time of puberty?

 14

How did Mendel interpret his result to show that traits may be dominant or recessive? Describe briefly.

 16

What is meant by scattering of light? The sky appears blue and the Sun appears reddish at sunrise and sunset. Explain these phenomena with reason.