Question

Which of the following organism is non-poisonous?
A. Scorpion
B. Centipede
C. Crab
D. Spider

Answer 1

Hint: The non-poisonous organism doesn’t contain poison and only some of their species produce toxins. All of the given organisms belong to the phylum Arthropoda (jointed appendages).

Complete answer: The scorpions are found in many habitats such as the desert, grassland, and the mountains. Scorpion sting is very painful and deadly. Their venom consists of neurotoxins which affect the nervous system of the person; they also cause cardiac irregularities, paralysis, difficulty in breathing, and also can lead to death. The centipedes are carnivorous and are poisonous, they usually attack insects and worms and rarely they attack humans, but when attacked it is very painful and can lead to danger to health, their venom produces toxins which include chemicals that can cause allergic reactions, they have cardio-depressant toxin -S which leads to the cardiovascular effects. The spiders are almost poisonous leaving some small which do not have poison, their bite is also called the archaicism which results in injury. The crabs are a component of people’s diet around the world, however, not all crabs are safe to eat as some may carry toxins that can be lethal but they are not poisonous.
Hence, the correct option is ‘C’

Note: The crabs are not poisonous and they do not produce the toxins themselves. Crabs are consumed by the people in their diet but not all of the crabs are safe to eat as some may have toxins that can be lethal, in crabs only a small number of their family is known to be toxic.