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Q. How is gas exchange done in flatworms?
Platyhelminthes exchange gases exclusively by diffusion through their body surface. This is only possible because all cells are localized relatively near to the exterior since gases diffuse cell by cell the flat shape of these worms is a feature that allows this kind of respiration.
Processes in Succession - Ecology Whether succession is primary or secondary, in terrestrial or aquatic ecosystems, the basic processes involved in succession are similar. The
What are the elements that constitute the stomata? The Stomata is made of a central opening the ostiole or slit delimited by two guard cells responsible for its closing or open
Complete feed system in ruminants Complete feed system for feeding dairy animals is a departure from conventional individual rationing method. It involves the self-feeding of
Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Blood plasma levels of Glucose. B. Blood plasma le
discuss locomotion in annelids
Heat Production In the Homeotherms heat production must be elevated if the ambient temperature falls below the critical temperature. Although all metabolic processes result i
Distinguish among the terms 'pesticide', 'insecticide' and 'herbicide. A pesticide is a compound which destroys or controls any organism which is considered to be harmful
What are differentiations of the cell membrane? In some types of cells, the cell membrane presents differentiations that are essential for the specific functions of the cells.
What are plasmids? Plasmids are circular DNA molecules there in the genetic material of some bacteria. They might be containing genes responsible for bacterial resistance to so
Explain Mechanism of Absorption of Haem Iron? Haem iron is soluble in the alkaline environment of the intestine. It binds to the receptor on the enterocytes and is internalized
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