Weekly Environment and Ecology

Comments

Post a Comment

More On Blog

Parasitic adaptation of Taenia

Taenia Parasitic adaptations Tapeworms live as internal parasites and they have to make several adjustments for the same. The following are few of the adaptations made by these tapeworms to make their life easy in their hosts. Presence of enzymatic resistant covering A hard covering called as tegument covers the body of these tape worms. Tegument is enzyme resistant and it protects all the internal organs from the digestive actions of the alkaline fluids of the host. On the other hand tegument is permeable to water and other nutrients. Absence of locomotory organelles This parasite lacks organs for locomotion. As there is no need for any locomotory organs both the adult and larval forms lack cilia or flagella. Osmotic pressure The osmotic pressure inside the body is higher than that of the surrounding host tissue or fluid. This helps the parasite to reside conveniently in the host body. Presence of hooks and suckers for attachment For the attachment purpose a scolex...
Read more

Questions for 30 july zoology

Q:-1 Discuss the origin of mammals and briefly explain adaptations of aquatic mammals. (20) Q:-2 Give the anatomical features of pituitary gland. Describe its secretions regulating other endocrine glands with feedback mechanism. (15) Q:-3 Compare the features monotremata and marsupials. How they are different from primates. (15) Q:-4 What is speciation? How natural selection operates? (10) Q:-5 Define isolation. Give various isolation mechanism and describe how they are contributing to speciation? (20) Q:-6 Compare the Batesian and Mullerian mimicry. Discuss evolutionary significance of mimicry. (20)
Read more

Ecology: concept and application

Ecology: Concepts and Applications, 8th edition by Molles and Sher places great emphasis on helping students grasp the main concepts of ecology while keeping the presentation more applied than theoretical. An evolutionary perspective forms the foundation of the entire discussion. The book begins with the natural history of the planet, considers portions of the whole in the middle chapters, and ends with another perspective of the entire planet in the concluding chapter. Its unique organization of focusing only on several key concepts in each chapter sets it apart from other ecology texts. Download the PDF here Click here
Read more

Anthropology Test Week 2

Week 2 Instructions:- There are Eight questions divided in Two sections. All questions are compulsory. Adhere to world limit wherever specified. The number of marks carried by a question is indicated against it. Paper - I Q:-1 Write notes on the following in about 150 words each: (10X5 = 50) 1) Secondary structure of DNA 2) Rhodesian man 3) Lower palaeolithic Culture 4) Chromosome walking 5) Javanicus Q:-2 Discuss the locomotive behaviour of prehistoric human primates and state how does it help in understanding the structural and functional correlations of their forelimb structure. 20 Q:-3 Comment on mendelian principles and their applications in genetic analysis. (15) Q:-4 Mutation is the hidden force behind evolution, justify the statement with suitable examples and discuss about sources of mutation. (20)                                Paper - II Q:-1 Write notes on the follow...
Read more

Question for 03 August Zoology

Q:-1 Elucidate the adaptations of animal living in fresh water habitats. (10) Q:-2 What is IUCN? How code of nomenclature evolved? Explain the role of modern tools and computational analysis in nomenclature. (20) Q:-3 Define ecosystem. Give its various components. How they are operating. (15) Q:-4 What is ecosystem services? Why is there a need of legislative verdict on it.? Discuss. (20)
Read more