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