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Tracheae - Respiration
Insects that have successfully colonised the terrestrial environment have evolved a respiratory system very different from other land animals - the tracheal system. Apart from insects other arthropods, such as millipedes, centipedes, a few arachnids and terrestrial crustaceans have tracheae as respiratory organs.
What is adaptive radiation? Adaptive radiation happens when a new population in a new environment, like an island, undergoes divergent evolution until the descendant population
Determine the posterior superior alveolar nerves The anterior, middle and posterior superior alveolar nerves run in the facial wall of the maxillary sinus between its lining me
Q. Chronic exposure of Cadmium? An increase in the soil cadmium content due to soil pollution by industrial wastes, burning of coal, fossil fuels, sewage sludge, medical and
Some of the characteristics of Bt cotton are: 1. Long fibre and resistance to aphids 2. Medium yield, long fibre and resistance to beetle pests 3. High yield and produ
Why is it important that a cell membrane does not allow all dissolved substances to diffuse freely through it? If the cell membrane were freely permeable, harmful substances co
Discuss important factor of obesity Weight is a most important factor for identifying obesity. Weight is measured in kilograms (kg). It is measured during the first visit and n
what is a bio molecule
The cytoskeleton is a network of very little tubules and filaments spread throughout the cytoplasm of eukaryotic cells. It is made of microtubules, microfilaments and intermediate
SEXUAL REPRODUCTION You must be aware that reproduction is one of the distinguishing features of living beings. Reproduction is basically of two types: asexual and sexual. In ase
The method of recombination or crossing-over Which of the following is a false statement regarding the method of recombination or crossing-over? A. Crossing-over takes place
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