EXPLANATIONXII IPA 1

BYMACHFIRA YUSNA

YULFRIZA THREZASYARI

Metamorphosis

Picture of Metamorphosis

Explain of MetamorphosisComplete

Explain of Metamorphosis in Complete

Metamorphosis

Metamorphosis starts with a larva or a nymph, then passes through a

pupa, and ends as an adult. => (general statement).

There are two main types of metamorphosis in insects, complete and

incomplete. In incomplete metamorphosis, the development of larva

often proceeds in repeated stages of growth. These stages are called

instars. The juvenile forms closely resemble adults, but are smaller. The

adult has wings, but juveniles lack of wings. => (explanation).

The complete metamorphosis. Here the larvae differ markedly from

the adults. The first stage is a larval stage, then enter an inactive state

called pupa, and finally emerge as adults. Inside the pupa, the insect will

excrete digestive juices. This destroys much of the larva’s body, leaving

a few cells intact. The remaining cells will begin the growth of the adult,

using the nutrients from the broken down larva. => (explanation).

explanation

EXPLAIN OF METAMORPHOSIS COMPLETE

In order for a tiny, newly hatched caterpillar to grow into a brilliant moth

or butterfly, it must first become fat very fat. In fact, the caterpillar seems to

have only two preoccupations in life: eating and moulting.

Although mammals, fish, birds, and reptiles have skeletons that support

their body, arthropods including insects do not. Instead, God designed them

with a hard skin or shell called an exoskeleton. A caterpillar’s exoskeleton

may seem soft, but it gives the caterpillar its entire shape (which sometimes

includes fleshy spikes or horns). Yet it remains flexible enough to allow for

gymnastic stretches toward high leaves. Further, the exoskeleton doesn’t

grow; a larger exoskeleton forms folded beneath the smaller one.

When the time is right, the tight, old skin splits open and the caterpillar

wriggles carefully out, ready to try out its new exterior. After each moult,

the caterpillar is bigger and may be a slightly different shape or colour.

Explanation

Picture of Metamorphosisexplanation

Meanwhile, deep within the caterpillar’s body are clusters of

cells imaginal discs. These are positioned to grow into wings, jointed

legs, and compound eyes. After the caterpillar has moulted into its

largest body size, it prepares to become a pupa by spinning a cocoon,

burrowing underground, or in the case of most butterflies, forming a

chrysalis.

As it lies there very still, hormones from within the

caterpillar’s brain signal the body to develop into the adult stage.

These cause the imaginal discs to burst into action, forming antennae,

scaled wings, reproductive organs, and every other body part needed

by the adult.

Even the muscular system must be reorganized to

accommodate the wings. Some muscles are destroyed, some are

‘reconstructed,’ and others are formed brand new. When the adult

moth or butterfly emerges, it looks nothing like the squirmy worm it

once was.

Explanation

EXPLAIN OF METAMORPHOSISIN COMPLETE

The type of metamorphosis described above, which

insects like moths, butterflies, bees, flies and ants undergo, is

known as ‘complete’ metamorphosis and involves four stages:

AdultEgg Larva Pupa

explanation

In the case of a moth, the caterpillar is the larva, the cocoon is

the pupa, and the colorful winged creature you might catch in a net is

the adult.

However, a second type of metamorphosis is used by insects

such as termites, grasshoppers, crickets, cicadas and aphids. This

involves changing from egg (1) to nymph (2) to adult (3) only three

stages.

Egg Nymph Adult

explanation

This ‘incomplete’ metamorphosis does not involve a pupa.

The nymph simply looks like a miniature adult, and as it moults it

grows progressively larger, until it reaches its adult form with fully

developed wings and reproductive organs.

Darwinists face colossal problems when they attempt to

explain the origin of metamorphosis in terms of random mutation

and natural selection

Each stage in the insect’s life is crucial. Darwinists face

colossal problems when they attempt to explain the origin of

metamorphosis in terms of random mutation and natural

selection, because any gap or error in the cycle normally kills the

insect or prevents reproduction. If a caterpillar can’t squeeze out

of its old exoskeleton, if it isn’t able to form a cocoon or chrysalis,

or if it fails to rearrange muscles and grow body parts as a pupa,

it dies. It never becomes an adult, and therefore it does not

reproduce it self.

explanation

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explanation