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Q. Do echinoderms have an excretory system? How is excretion done in these animals?
Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
It consists of: - Two kidneys that produce urine. - The left and right ureters that the urine travels through on leaving the kidneys. - The muscular urinary bladder, which
VASCULA R TISSUES (= FLUID TISSUES) - The vascular tissues are of two types: blood and lymph.
Q. What is the kinds of asexual reproduction that occurs in hydras? Hydras reproduce asexually by budding.
Mating and Fertilisation In all animals sperms are motile and have to move and seek the eggs to fertilise them. For this an aqueous environment is necessary. This need of a li
The cell membrane is a slim semi-permeable membrane which surroundings the cytoplasm of a cell. Membrane function is to defend the integrity of the interior of the cell by allowing
Erwin Chargaff conducted a series of experiments in which he was calculating the amounts of dissimilar nucleotides that were present in dissimilar tissues and organisms. These stud
Why is the carbon dioxide concentration a limiting factor of the photosynthesis process? When the carbon dioxide concentration is increased indefinitely is photosynthesis also incr
Will the plant-incorporated protectants rules affect the Bt reassessment? No. To make sure that our biotechnology assessments reflect the latest data on health and ecological e
make assignment multiple alleles
What are the Stages of soil The development of soil takes place in two stages. In the first stage there is formation of parent material which is generally consolidated and cons
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