19. The horseshoe crab’s unique features include its (?) which function as a foo

Question

19. The horseshoe crab’s unique features include its (?) which function as a food shredder and its (?) which is used to flip itself over with.

20. The scorpion’s 2 defenses are its (?) on the end of its tail which houses a (?) ready to be injected and his super (?) pedipalps bearing (?).

21. The spider’s (?) allows it to sense danger or vibrations around itself.

22. The use of a (?) is a very efficient method to ensure the transfer of male gametes to the (?).

23. The velvet worms distinguishes itself by having (?)(?) at its anterior end, (?) to move around and (?) glands for capturing prey and defending itself.

24. When (?)(?) are used for the arthropod’s excretory system, the fluid can be called ‘urine’.

25. Xray techniques are used to study these (?) arthropods know as (?) that are revealing important information on their (?) environment.

Explanation / Answer

1a) Gnathobase - The gnathobase acts like a jaw to breakdown solid food in horseshoe crabs. It surrounds the mouth and the hind legs help the gnathobase in its process.

1b) Telson - The tail of the crab that is used like a rudder in swimming and helps in turning the body over on surfaces.

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