Question

roundworms , louse , bed bug , tick which of them are odd man out

Answer 1

Louse is the odd one out the rest of them are parasites

Bed bugs are obligate blood-sucking insects belonging to the Cimicidae family. They are ectoparasites with a long history of presence in human communities. They are a major concern to public health and currently one of the most common ectoparasites, affecting human life worldwide

Roundworms can live in the human intestine for a long time. They can be harmful and cause many problems, including abdominal (belly) pain, fever and diarrhea. Roundworms have long, round bodies and can be of different sizes, depending on the type.

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Answer 2

Answer:Louse

Explanation:

Louse is the odd one out because the rest of them are parasites.

• Roundworms:These are primitive organisms, having no respiratory or circulatory system. They have a hollow body with two openings at the ends,and  the head is not distinctive or identifiable to the naked eye.
• Louse:Wingless, elongated body with 3 segments (head, thorax and abdomen). Short antennae with 4 segments. Small head with anterior piercing mouthparts that are used to pierce the scalp and feed on blood. 6 short and stubby legs with single tarsal segments, with powerful hook-like claws at the end of each leg.
• Bed bug: Despite the overall consensus that the earth's ecosystem could survive without bed bugs, some scientists insist that bed bugs are a food source for spiders, a very necessary element for making the planet habitable.

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