- 1 0 年前最佳解答
Stages Of A Butterfly
Tiny eggs are laid by the female on a leaf.
Around 5 days later, a tiny wormlike creature will hatch.
The caterpillar is the primary eating and growth stage of the insect.
The pupa or chrysalis is the resting or transformation stage, and within it the marvelous transformation from caterpillar to adult takes place.
The adult emerges from the chrysalis.
When butterfly is emerging, the pupa skin splits, the limp, damp butterfly crawls out-now with compound eyes, a proboscis for feeding and six legs.
The wings are expanded and blood is pumping into them. A little warming from the sun and it is now ready to fly off to feed and then lay its eggs.參考資料： Google + me
- 1 0 年前
Butterflies are holometabolous insects, and go through complete metamorphosis. There are 4 stages in butterflies' lifecycle: egg, larva, pupa, adult butterfly.1.Butterfly eggs consist of a hard-ridged outer layer of shell, called the chorion. This is lined with a thin coating of wax preventing the egg from drying out before the larva has had time to fully develop. Each egg contains a number of tiny funnel-shaped openings at one end, called micropyles; the purpose of these holes is allow sperm to enter and fertilize the egg. 2. Larvae, or caterpillars consume plant leaves and spend practically all of their time in search of food. Butterfly caterpillars have three pairs of true legs from the thoracic segments and up to 6 pairs of prolegs arising from the abdominal segments. Many have false eye-spots to enhance this effect. Ecdysis is a main process of caterpillars. 3.At this point the larva stops feeding and begins to find a suitable pupation site, often the underside of a leaf. The larva transforms into a pupa (or chrysalis) by anchoring itself to a substrate and moulting for the last time. To transform from the miniature wings visible on the outside of the pupa into large structures usable for flight, the pupal wings undergo rapid mitosis and absorb a great deal of nutrients. In the pupa, the wing forms a structure that becomes compressed from top to bottom and pleated from proximal to distal ends as it grows, so that it can rapidly be unfolded to its full adult size. 4.The adult stage of the insect is known as the imago. The fore and hindwings are not hooked together, permitting a more graceful flight. An adult butterfly has six legs. After it emerges from its pupal stage, a butterfly cannot fly until the wings are unfolded. A newly-emerged butterfly needs to spend some time inflating its wings with blood and letting them dry, during which time it is extremely vulnerable to predators. Most butterflies will excrete excess dye after hatching.
2008-04-27 21:57:16 補充：
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