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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.
porifera canal system skeleton
CELLULOSE It is a linear polymer of b -D-glucose. It is the structural polysaccharide of plant cell walls, walls of some primitive fungi, some protists, and tunic of asci
Other Complications : Bioprosthetic valves have a tendency for degeneration, calcification or cusp perforation. Current models have overcome many of these problems. Calcification
Q. Show the Inventory of the plants? A flora provides an inventory of the plants of an area and is often restricted to the vascular plants. Floras contain description of plants
SIGNIFICANC E OF GASTRULATION - It results in the formation of three germ layers. It also resutls in the formation of different organs & organ systems. Gastrulation is e
How last chamber of heart in cockroach receives blood without having ostia?
Explain the Working Principle of Spectrophotometer? The working principle of spectrophotometer is graphically presented in Figure. Figure: Working princip
Since erythrocytes red blood cells do not hold any sub cellular organelles they are essentially a membranous sac for carrying haemoglobin their plasma membrane is a convenien
Put the following in the most probable order
What are the major natural plant hormones and what are their respective effects? The major natural plant hormones and their respective functions are the following- Auxins that
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