It is on the adaptaions of insects. Haveto turn it i tommorow. So please put in the answers before 8:00 in India.
2006-10-26 02:50:20 · 7 answers · asked by Gita 3 in Science & Mathematics ➔ Biology
7th grade. Desparate.
2006-10-26 03:12:30 · update #1
Need info on the Dragonfly
2006-10-26 04:47:13 · update #2
_________Seasonal adaptations in insects______________
Seasonality is a dominant feature of Canadian environments. The Survey’s long-standing project on seasonal adaptations in insects addresses various topics in conjunction with the roles of seasonal constraints in determining the fauna of the country, especially in northern regions. In northern Canada, conditions are so severe that many species cannot meet the resulting environmental challenges. Some consideration of seasonal adaptations therefore is included in various predominantly faunal publications of the Survey on Canadian, arctic, boreal, and Yukon regions.
More specific Survey studies and reviews have addressed a range of seasonal themes, such as cold hardiness and dormancy / diapause, as well as seasonal control and other aspects of life cycles more generally. These approaches have yielded several key findings. For cold hardiness, they include the importance of habitat choice as well as physiological and biochemical mechanisms of cold hardiness, and the need to integrate many elements – such as timing and energy use as well as just seasonally cold temperatures – into understanding cold hardiness. Recent work on cold hardiness focusses on the parallels between desiccation protection and cryoprotection, especially the role of trehalose; and on adaptations of species from harsh environments such as the high arctic moth Gynaephora groenlandica (cf. Arctic Insect News 10: 7-10, 1999) including a recent NSERC grant for cooperative work that includes the genetic control of some elements of the response.
A recent analysis of dehydration in dormant insects considers many features linked to both cold hardiness and dormancy. For dormancy, a major conclusion from the Survey’s project is the need to view dormancies as developmental pathways that are an alternative to direct development. In this view, life cycles comprise a series of successive developmental choices rather than the action of a simple on-off switch. Such a conclusion, and more general consideration of the diversity and evolution of insect life cycles, emphasizes the breadth of trade-offs that must be understood to evaluate any particular life cycle. Recent work in this field includes several attempts to identify key patterns in the responses and fruitful ways to study them. These discussions again reinforce the value (in contrast to piecemeal studies prevalent in the past) of studying multiple facets of adaptation simultaneously in single species, preferably those that are relatively well known taxonomically (to avoid unpleasant surprises about the identity of the material) and for which there is adequate ecological information (so that key habitats and ecological pressures are already known).
The Survey’s project continues with other reviews in progress on the themes of cold hardiness, dormancies and life cycles.
2006-10-26 03:03:34 · answer #1 · answered by Mickey 2 · 2⤊ 0⤋
Dragonfly have compound eye for it to see things seperately.\It has ocelli that help monitor the position of the horizon, thus keeping it at flying level.
Hairs are present around the mouth to help taste food and guiding it in.
2006-10-29 08:51:25 · answer #2 · answered by Mike 4 · 1⤊ 0⤋
Are you from Kolkata. If, can contact me in this email id. I am class XI (Science). I've done a project on Pesticide-based on insects. Thanks.
2006-10-26 10:00:51 · answer #3 · answered by Mouktik Saha 2 · 0⤊ 0⤋
Um, this site isn't meant to get people to do your homework. If you have homework QUESTIONS, that is one thing. But to ask someone to do your homework for you....nope...
All I have to say is www.google.com...you better get started!
2006-10-26 09:59:39 · answer #4 · answered by kelikristina 4 · 1⤊ 1⤋
don't worry geta i will tell u some thing something go to google and type diversity of insects[arthropods]
ALL THE BEST...................
2006-10-26 11:56:53 · answer #5 · answered by Anonymous · 1⤊ 0⤋
stick some dead cockroaches in your report!
2006-10-26 12:03:20 · answer #6 · answered by ishu 2 · 0⤊ 1⤋
hay,how can you lie,it is already over.
2006-11-01 01:52:28 · answer #7 · answered by hpz ftw 4 · 0⤊ 0⤋