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Define Subphylum Chelicerata - classes Arachinda AM merostomata?The subphylum Chelicerata includes familiar horse shoe crab, spiders, scorpions, ticks and mites.1. Body consists of an anterior prosoma and a posterior opisthosotna.
2. Prosoma bears the appendages involved in feedings and locomotion. Opistliosoma may have exterior segmentation but appendages are either absent or considerably reduced.
3. Their main appendages are clielicerae and pedipalpi.
4. Antennae and mandibles are absent.
5. These are the first land animals in evolution of arthropods which have successfully colonised the terrestrial environment.
the main excretory system in lower animals
Hydrogen ( H) has 1 electron, carbond ( c) has 6 electrons ; oxygen ( O) has electrons, Nitrogen ( n) HAS 7 electrons. Use the octet rule to determine which of the following is mos
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Which are the organs of the excretory system? The excretory system is produced of kidneys (two), ureters (two), bladder and urethra. The Excretory System - Image Diversity:
all about excretion
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Explain why the chance of fertilisation in humans is restricted to only a few days each month. Sperms can fertilise an ovum for up to about three days after entering the female
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