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Q What is the alternative means for transport of substances in animals without a circulatory system? Why is blood important for larger animals?
In animals that don't present the circulatory system the transport of substances occurs by cell to cell diffusion, the blood is a essential means of substance transport for larger animals since in these animals there are tissues distant from each other and from the environment thus making diffusion impossible.
body symmetry
Explain about colloidal system A colloidal system, on the other hand, is a heterogeneous system. The material that forms the base of the system is called the dispersion medium
What happens to respiratory system in a man going up a hill?
Dormant Vegetative Structures You have learnt that light a period of chilling or application of gibberellin often breaks seed dormancy and stimulates seed germination. Vegetat
What is Osmosis ? Osmosis : Osmosis refers to the diffusion of water across a semi-permeable membrane from an area of higher concentration of water to an area of lower con
Foods that are frequently incriminated in staphylococcal food poisoning include meat and meat products, poultry and egg products, egg, tuna, chicken, potato and macaroni, bakery pr
Lungs - Respiratory Organs In arachnid arthropods such as scorpion and spider, respiration takes place by means of book lungs. There are four pairs of these structures in the
POSSIBLE ERRORS IN DRUG ADMINISTRATION There can be various reasons for error in administering drugs: i) Poor communication of intention by the prescriber. ii) Failur
Bud grafting A 'T' shaped incision is made on the bark of the stock. A bark is removed on either side of vertical cut. A single bud scion with a little wood is placed
Based on the simplified two-gene model for eye colour, explain using genotypes how two blue-eyed parents could produce a brown-eyed child. In what ways is genomic imprinting sim
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