The Difference Between Metamorphosis and Metagenesis
Metamorphosis
In a period of growth, certain animals undergo a change of growth stage. For example on a butterfly. At first, the butterfly's mother incubates the egg. The egg is then turned into a caterpillar (larvae).
The butterfly larvae will live within a certain period of time and then transform into a cocoon. The cocoon then changes to the next stage of becoming an adult butterfly.
The gradual shifting of form in animals during their lifetime is called metamorphosis.
There are two types of metamorphosis.
1. Perfect metamorphosis
Animals undergoing perfect metamorphosis will experience the following stages.
Egg phase - larva - pupa (cocoon) - imago (adult animal)
Animals experiencing the perfect metamorphosis, body shape initially different from the adult body. Animals with perfect metamorphosis include - butterflies, flies, and mosquitoes.
2. Imperfect metamorphosis
Animals undergoing imperfect metamorphosis will pass through the following stages of change.
Egg phase - Nymph (young animal) - An adult animal
Animals with imperfect metamorphosis did not experience significant body shifts, between the initial phase and the adult phase. Their body shape is almost the same (only changes in body size).
Examples of animals that experience imperfect metamorphosis are grasshoppers and cockroaches.
The frog is the only vertebrate animal undergoing metamorphosis. Frog life cycle begins with frog egg fertilization. Frog eggs will hatch after 10 days and turn into tadpoles.
By the age of 8 weeks, the hind legs of tadpoles begin to form. This stage is called a legged tadpole. At the age of 12 weeks, the front legs of tadpoles begin to grow and young frogs form. Young frogs then grow into adult frogs, so ready to lay eggs and fertilize.
Metagenesis
Metagenesis is the process of altering the offspring between the gametophyte phase and the sporophyte phase. Spores are a reproductive tool in the sporophyte phase. Before the spores are formed, there is a process of gamete formation and fertilization (gametophyte phase).
Metagenesis occurs in nail and moss plants.
Adult nail plants that we often find in the forest, is the generation of the sporophyte. In the sporophyte phase, the nail plants are larger and live longer than the gametophyte phase.
In the sporophyte phase, the adult spikes produce spores. Spores that are formed are usually placed under the leaves. after the spores fall in a suitable place, the spores can germinate to form prothallium.
Protalium then grows into a gametophyte. after adulthood, gametophytes will form antheridium and archegonium. Antheridium will produce spermatozoa and archegonium will produce an ovum.
When the ovum is fertilized spermatozoa, it will form a zygote which then grows into a young sporophyte. Young sporophytes then turn into adults and ready to repeat all the above process.
In a period of growth, certain animals undergo a change of growth stage. For example on a butterfly. At first, the butterfly's mother incubates the egg. The egg is then turned into a caterpillar (larvae).
The butterfly larvae will live within a certain period of time and then transform into a cocoon. The cocoon then changes to the next stage of becoming an adult butterfly.
The gradual shifting of form in animals during their lifetime is called metamorphosis.
There are two types of metamorphosis.
1. Perfect metamorphosis
Animals undergoing perfect metamorphosis will experience the following stages.
Egg phase - larva - pupa (cocoon) - imago (adult animal)
Animals experiencing the perfect metamorphosis, body shape initially different from the adult body. Animals with perfect metamorphosis include - butterflies, flies, and mosquitoes.
2. Imperfect metamorphosis
Animals undergoing imperfect metamorphosis will pass through the following stages of change.
Egg phase - Nymph (young animal) - An adult animal
Animals with imperfect metamorphosis did not experience significant body shifts, between the initial phase and the adult phase. Their body shape is almost the same (only changes in body size).
Examples of animals that experience imperfect metamorphosis are grasshoppers and cockroaches.
The frog is the only vertebrate animal undergoing metamorphosis. Frog life cycle begins with frog egg fertilization. Frog eggs will hatch after 10 days and turn into tadpoles.
By the age of 8 weeks, the hind legs of tadpoles begin to form. This stage is called a legged tadpole. At the age of 12 weeks, the front legs of tadpoles begin to grow and young frogs form. Young frogs then grow into adult frogs, so ready to lay eggs and fertilize.
Metagenesis
Metagenesis is the process of altering the offspring between the gametophyte phase and the sporophyte phase. Spores are a reproductive tool in the sporophyte phase. Before the spores are formed, there is a process of gamete formation and fertilization (gametophyte phase).
Metagenesis occurs in nail and moss plants.
Adult nail plants that we often find in the forest, is the generation of the sporophyte. In the sporophyte phase, the nail plants are larger and live longer than the gametophyte phase.
In the sporophyte phase, the adult spikes produce spores. Spores that are formed are usually placed under the leaves. after the spores fall in a suitable place, the spores can germinate to form prothallium.
Protalium then grows into a gametophyte. after adulthood, gametophytes will form antheridium and archegonium. Antheridium will produce spermatozoa and archegonium will produce an ovum.
When the ovum is fertilized spermatozoa, it will form a zygote which then grows into a young sporophyte. Young sporophytes then turn into adults and ready to repeat all the above process.
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