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Q. In arthropods why isn't gas exchange done through cutaneous diffusion?
In arthropods the impermeability of the exoskeleton makes the way of gases difficult. In addition the new methods of respiration present in arthropods were preserved by evolution because they were more capable for those animals.
Define factors affect the rate and total drying time? Four main factors affect the rate and total drying time, which include: a) The properties of the products (the moisture
Numerous receptors have intrinsic or tightly related enzyme activity. On the required of ligand to their extracellular face like receptors undergo a conformational change and acti
GRAFFIAN FOLLICLE - It appears as knob or stigma in medulla. It is round, discovered by Graff. It is covered by 2 layers - thecae externa & theca interna. From theca i
Biota of Lakes Lakes exhibit life zones. So far you have been reading about the vertical zonation of lakes. The lakes can be divided into horizontal zones as well. This divis
Gibberellins - Plant Growth Substances In late 1920's Kurosawa observed that the medium in which the fungus Gibberella had grown could cause the abnormal tallness in rice seed
Q. From which features do osteichthyes and condrichthyes get these names? "Chondros" means cartilage, "ictis" means fish (both from the Greek) the name chondrichtians is for fi
How potassium is essential for the following physiological functions It is vital for photosynthesis. When K + ion is deficient, photosynthesis declines and respiration incr
how chlorophyll is degaded in plants?
REASON'S FOR MENDEL'S SUCCESS 1. Mendel selected only pure breeding varieties of pea ( Pisum sativum ) for his experiments. 2. Mendel took only those traits
Q. Explain about Spring Model ? The spring model depicts elasticity. A force is applied in terms of load onto the spring as illustrated in the figure 8.6. When the force is app
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