Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Imaginal Discs
In the holometabolous larva, there are two cell populations:
(1) The larval cells that are used for the larval structures and
(2) The imaginal disc and the histoblasts that are present in clusters, awaiting the signal to differentiate.
Imaginal discs do not take place in the nymphs and larvae of hemimetabolous insects. The imaginal discs or buds are actually rudiments of future organs of the adult, like mouth parts, wings, antennae, walking legs, and internal organs etc. Figure displays the imaginal discs in the larva and pupa of a fly (Musca). These discs develop directly from the eggs and remain nonfunctional during the larval stages. During the pupal stage they grow in size and differentiate to form adult structures which remain collapsed and folded. While the reorganization is completed the pupa moults to set free the adult or imago. Once the adult or imago blood is pumped into this collapsed structure it causes them to unfold and inflate. Furthermore chitin is deposited on then to harden them.
Figure: Imaginal Discs
Duck virus hepatitis This highly contagious disease of ducks is caused by a member virus belonging to genus Enterovirus of the family Picornaviridae. It mostly affects duckling
Explain the Objectives of Taxonomy Let us summarise the objectives of taxonomy: 1. To inventory the world flora and fauna 2. To provide a method for identification and co
The enhancer is the cis-acting nucleotide series to which the transcription factor(s) bind, and which increases transcription of the gene. It is not part of the promoter; the gener
List the four phases of mitosis, and briefly explain what occurs during each phase. Prophase: the chromatin coils and produces chromosomes, the nucleolus and nuclear envelope d
What are gametes? Gametes are cells specialized in sexual reproduction. They have half of the maximum number of chromosomes of the species and unite with another gamete giving
Applications of Computers in Medical and Nursing Establishment As computers are heavily used for storing and retrieving data the application can be administrative, clinica
Diagnosis Health history - any recent surgery/dental procedures, history of heart disease, recent infectious diseases, etc. Clinical Manifestation Laboratory
Influence of LV Function : LV functions, whether normal or impaired is important while selecting a patient for CABG and for long-term results of surgical revascularisation. If le
What is the primary structure of a protein? What is the importance of the primary structure? Ans) The primary protein structure is the linear sequence of amino acids that produc
Define briefly about the Cereal Proteins? Cereal grains, properly ripened and dried for optimum storage stability, have protein content ranging from 6-20%. Proteins are found i
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd