Reproduction

Question 1

Length of human DNA

Answer 1

2.2 m

Question 2

2 types of reproduction

Answer 2

Sexual
Asexual

Question 3

What is DNA copying

Answer 3

DNA replication is another term for DNA copying.
DNA replication is the biological process of creating two identical duplicates of DNA from a single original DNA molecule.

Question 4

What is variation?

Answer 4

any difference between the individuals in a species or groups of organisms of any species

Question 5

Fission

Answer 5

An organism divides into 2 or more individuals by mitotic division in this type of reproduction.

Question 6

2 types if fission

Answer 6

Binary fission
Multiple fission

Question 7

Binary fission

Answer 7

Occurs during favourable condition
Nucleus divides only once
Protective covering is not formed around an organism.
The parent organism splits into 2 daughter nuclei, followed by the division of cytoplasm, thus resulting into 2 identical individuals (daughter cells)
Example: amoeba paramecium

Question 8

Multiple fission

Answer 8

Occurs when an organism faces unfavourable environmental conditions.

Nucleus divides repeatedly to form large number of nuclei.

A protective covering is formed around the organism during multiple fission.

Simultaneous division of the parent body into many daughter individuals.

Example: plasmodium

Question 9

What is the protective covering formed around an organism during multiple fission?

Answer 9

Cyst

Question 10

What is fragmentation?

Answer 10

In multi-cellular organisms with simple body organisation, the body simply breaks down into smaller pieces upon maturation. These fragments grow into new individuals.

Example: spirogyra