- Organisms proliferate.
- The mechanism of cell proliferation is different in bacteria, animals, and plants.
- Organisms proliferate through asexual or sexual reproduction.
- Asexual reproduction is observed in many bacteria and microbes as well as in animals and plants.
- Sexual reproduction occurs in many eukaryotes.
- In sexual reproduction, meiosis results in the formation of haploid male and female gametophytes, and fertilization results in return to diploidy.
- Whether haploid or diploid is predominantly observed in a life cycle depends on the organism.
- The significance of sexual reproduction possibly lies in maintenance of species diversification and accurate maintenance of chromosomes.
- The growth of organisms is influenced by environmental factors such as light, and the switch from vegetative growth to reproductive growth depends on seasonal changes.