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!
Temperature Stress
We know that temperature alongwith water is an important influence on the geographical distribution and range of organisms. Every organism is restricted to a definite range of temperature, which may be quite dissimilar for different species. In other words, there is an upper and lower lethal temperature above and below which a given organism cannot perform the normal life activities and may suffer irreversible damage or may die.
The lower minimum and upper maximum lethal temperatures and optimum temperature are termed as cardinal temperatures and these vary from species to species. Some organisms have narrow limits of tolerance to high or low temperature (stenothermal) while some tolerate a wide range of temperature (eurythermal) (Figure shown below). Besides tolerance temperature range, organisms have different optimum temperature for growth, development and reproduction i.e. at the specific temperature, they perform specific function with maximum efficiency. The characteristics of terrestrial biotic communities are determined by the temperature and rainfall. Thus we find that different biomes distributed throughout the globe in accordance with the temperature which in turn is influenced by other factors. Since the temperature varies with altitudes as well as with latitude the variation in the vegetation from equator to higher latitudes is somewhat similar to that from planes to higher altitude.
The biomes in different regions have been named according to the kind of vegetation they support such as coniferous forest, deciduous forest, grassland, savanna etc. The deserts and the tundras experience extremes of temperature. The organisms of such biomes survive at the limits of the temperature tolerance. We will now describe the temperature stress on the organisms living in these biomes.
STRUCTURE Golgi body consists of :- (1 ) Cisternae These are plate like unbranched structure with dilated ends. One golgi body has 4-8 cisternae. Mono cisternal
Action of Hormones We said earlier that hormones are released into the blood stream or extracellular fluid and therefore, reach most of the cells of the body. However, they
Differential centrifugation divides cellular components based on the differences in their size and / or density. A tissue sample was homogenized and three parts (aliquots) of this
DISORDER S OF MALE REPRODUCTIVE SYSTEM (i) Prostatomegaly - Enlargment of prostate gland. It causes difficult & painful micturition. (ii) Impotence - Inability of male
Question 1 : What do you meant by medical writing? Show various types of medical writing. Define and explain briefly medical writing Discuss various types of medical w
1. Effect on general health: Noise pollution increases the rate of heart beat, constriction of blood vessels and blood pressure. Noise also causes anxiety, stres
Do all vascular plants develop annual rings? Vascular plants are those, which have phloem and xylem structures within them to transport water and nutrients around the plant. Mo
Causes of Apomixis Apomictic species are generally hybrids or polyploids, as a consequence, there is irregular meiosis. Apomixis appears to be controlled by a set of genes. T
SPECIE S CONCEPT - According to Davis and Heywood species define as assemblage of individuals with morphological features in common and separable from other such assembla
What is Life threatening haemorrhage Life threatening haemorrhage has been reported when a drill perforates the sublingual region of the mandible and injures the sublingual arte
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