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A home-made wormery
A wooden box 30 cm by 30 cm by 15 cm fitted with a glass front is beneficial for studying the habits of earth-worms.
Fill the box nearly to the top with layers of (a) sand; (b) leaf mould; and (c) loam, padding down every layer before adding the next.
Place lettuce leaves, dead leaves, carrot, etc. on the surface soil, together with few worms.
Keep the contents damp and examine the behaviour of the worms.
GONADS - They develop from the mesoderm of the embryo. The gonads are the sex glands; the ovaries and the testes. They produce ova and sperms respectively i.e. cytogenic in
What is the difference between the concepts of food chain and food web? The chain method is a theoretical model to study the energy flux in ecosystems. Actually in an ecosystem
what is osmoregulation.
Q. What is the major transformation presented by the glomerular filtrate in comparison to the blood? Glomerular filtrate is the name given to the plasma after it has entered th
Q. What kind of exoskeleton do some molluscs present? Some molluscs, like gastropods and bivalves secrete an external calcareous carapace (the shell). Calcium carbonate is a fo
Q. What is Dyspepsia? Dyspepsia is the most frequent disorder which we all experience some time or the other. Dyspepsia is the term given to a group of gastrointestinal symptom
Q. Using examples of invertebrate nervous systems how can the process of evolutionary cephalization be described? Considering the example of invertebrates it is observed that e
Body temperature is homeostatic ally regulated around a set point. Given your knowledge of negative feedback and homeostatic control system, predict whether narrowing or widening o
Define Intra enterocyte transport - non-haem iron absorption? Intra enterocyte transport: In the enterocyte, the absorbed iron can have one of the following metabolic fates:
can you tell 10 examples of trinomial system of nomenclature?
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