write down the three phases a sexually reproducing organism undergo during their lifetime
Answers
Answer:
There are three main categories of sexual life cycles: diploid-dominant, demonstrated by most animals; haploid-dominant, demonstrated by all fungi and some algae; and the alternation of generations, demonstrated by plants and some algae.
PHASES OF LIFE CYCLE:
Organisms have three phases.
1)Juvenile phase
2)Reproductive phase.
3)Senescent phase.
1)Juvenile phase/ vegetative phase
It is the period of growth between the birth of the individual upto reproductive maturity.
2)Reproductive phase/maturity phase
During reproductive phase or maturity phase the organisms reproduce and their offspring reach maturity period.
On the basis of time, breeding animals are of two types :
seasonal breeders and
continuous breeders
Seasonal breeders:
Reproduce at particular period of the year such as frogs, lizards and most birds,deers etc
Continuous breeders:
Continue to breed throughout their sexual maturity
Eg: Honey bees,poultry, rabbit etc...
3)Senescent phase:
It begins at the end of reproductive phase when degeneration sets in the structure and functioning of the body.