General process of post-hatching growth in insects, Biology

General process of post-hatching growth in insects

While a young insect hatches out from an egg it is covered by a firm, inflexible, sclerotized cuticle, which because of its rigid structure cannot grow along with the increase in length of the hatched larva. So during development, for the hatched larva to attain its adult size and form, the old rigid cuticle at each stage of growth has to be replaced by a newer, larger one by the process of moulting. As per the development is marked off by a series of moults. The interval between the two moults is termed as stadium and the type that an insect assumes as a result of the moults is called instar. All insects undergo various moults after hatching from the egg and before emerging as adults that are called imago.

The number of moults is 4 or 5 in an insect species and is generally fixed or predetermined, but it is not absolutely constant. Furthermore, the type of the insect changes with each moult in a precise pattern characteristic of the species. Moulting is not just a mechanical process; instead at each moult, the moulted insect goes through changes both in its cuticular covering and internal organization. So you can see that development in insects is generally by the process of metamorphosis. The metamorphic - alterations may be slight and gradual or radical as occurring during the pupal stage. During this stage the lama remains quiescent with no feeding or movement, while several larval characters disintegrate and adult structures are formed. Pupal stage follows the last larval molt and from the pupa the imago emerges.

Posted Date: 1/30/2013 6:51:57 AM | Location : United States







Related Discussions:- General process of post-hatching growth in insects, Assignment Help, Ask Question on General process of post-hatching growth in insects, Get Answer, Expert's Help, General process of post-hatching growth in insects Discussions

Write discussion on General process of post-hatching growth in insects
Your posts are moderated
Related Questions
how does autophagy help in converting a tadpole larva into an adult amphibian

How have prokaryotic cells given origin to aerobic eukaryotic cells and to photosynthetic aerobic eukaryotic cells? As per to the most accepted hypothesis aerobic eukaryotic ce

list all of the parts of a generalized cell that might be involved support movement coordination respiration digestion transportation excr production making proteins and reproducti

1. Compute the mean energy per nuclear disintegration, A, for 99m TC if 2.0 x 10 9 Bq of this isotope is injected into a patient. Assume that one-half of the administered dose is

Explain Hair changes - clinical signs of kwashiorkor? In kwashiorkor, the hair loses its healthy sheen and becomes silkier and thinner. It takes coppery red colour (referred to

On a given microscope, the numerical aperture of the objective is 1.5. The microscope is provided with a filter that selects a wavelength of 500 nm. What is the limit of resolution

Of which substance are microtubules made? In which structures and cellular processes do microtubules participate? Microtubules are made of consecutive dimers of the protein tub

The state of balance in the internal environment of the body it includes control of the water balance of the blood, body temperature, blood sugar level and blood urea level. Each o

characteristics of leucosolenia?

In biological studies which of the below is used to refer to iron-containing, oxygen-binding, conjugated protein complex present in sarcoplasm of muscle cells? a) Myelin b)