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!
Class of Subphylum Uniramia - Insecta
Class Insecta consists of nearly a million described species. There are more species of insects as compared to all the other species of animals combined. The most significant characteristic features of insects are the division of body into three tagmata that is, head, thorax and abdomen; presence of three pairs of legs and two pairs of wings on the thoracic region of the body hence some insects may have no wings. Insects have conquered the terrestrial environment so totally that they occupy every possible niche. They have' also invaded the aquatic habitats hence there are only a few marine species. Insects affect the ecology and human life in a number of ways. They have been both friends and foes of man. Evolution of flight, an impermeable cuticle and tracheal respiration are some of the issues which have contributed to their success on land. The head of insects is a composite structure. It bears a pair of antennae and a pair of compound eyes. There are also generally three ocelli. Three pairs of appendages comprise the mouth parts.
They are a pair of mandibles and two pairs of maxillae, of which the second pair of maxillae are fused to make the labium. The mandibles are covered in front by an upper lip or labrum. Into the anterior region of buccal cavity projects a median lobe such as process, the epipharynx. This arises from the base of the labium. The head is followed through a three segmented thorax - prothorax, mesothorax and metathorax. The tergum of the thoracic segments of insects is known as notum. The two pairs of wings articulate with meso and metathorax. While some primitive insects do not have wings (apterygotes), some higher forms have lost their wings secondarily. A pair of legs articulate with each of the three thoracic segments. Each leg is a jointed structure formed by coxa, trochanter, femur, tibia, and tarsus. The legs of different insects are variously modified to suit several functions such as walking, food collecting etc. The abdomen is composed of 9 to 11 segments. Abdomen bears a pair of sensory structures called anal cerci on the 11th segment. An intromittent organ in males for the transfer of spermatozoa and an ovipositor in females for the deposition of eggs are as well present in the genital segments of insects.
Grasping instruments -Plier or clamp forceps -put piece of rubber in the plier -applied on the buccal and lingual surface -make pressure to
Explain the Cladosporium - Fungi and Yeast? Classification Kingdom - Mycetae Division - Amastigomycota Form - Class - Deauteromycetes Form - Order - Moniliales F
Q. What is Pulmonary Edema? When the capillary pressure exceeds the plasma osmotic pressure, fluid first accumulates in the interstitial spaces. The components of the interstit
Occur in 10 per cent to 40 per cent of all native-valve IE, and complicates aortic IE more commonly than mitral or tricuspid IE. Periannular infection is of even greater concern wi
The human heart is a cone-shaped, four-chambered muscular pump located in the mediastinal cavity of the thorax between the lungs and beneath the sternum, designed to ensure the cir
Q. What is the cellular regeneration? How is the mitosis related to this process? Some tissues are capable to regenerate when injured. The liver, for instance, regenerates when
Enrichment of soil Indirect provision of minerals to grazing livestock includes mineral fertilization of pasture and altering soil pH, however this may not be always feasible
Which is the first (human) heart chamber into which blood enters? Where does the blood go after passing that chamber? What is the name of the valve that separates the compartments?
Capital Reserves 1. This is raised with selling shares at a premium. As the difference among the market price less floatation costs and par value is credited to the capital re
Cytology of Endosperm Normally the young endosperm is triploid as it is formed by the fusion of three haploid nuclei (male gamete + upper polar nucleus + lower polar nucleus)
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd