Invertebrate Zoology

Earthworms have no eyes - they detect light through specialized light-sensitive cells in their skin called photoreceptors. They are adapted to life underground where vision is unnecessary. The options with one, two, or three eyes are all incorrect as earthworms are completely eyeless creatures.

The cockroach's scientific name is Periplaneta americana - this doesn't mean it's from America, but reflects early specimen classification. The Periplaneta genus includes common cockroaches. 'Indicana' and 'africana' are incorrect, and 'antenna' refers to a body part, not a species.

Cockroaches can survive for several weeks without their heads because they have an open circulatory system and breathe through small openings in their body segments. They die only from starvation or dehydration.

Acridophobia is indeed the abnormal and persistent fear of grasshoppers and locusts. The term derives from 'acris' (Greek for locust) and 'phobia' (fear). This is a specific type of entomophobia (insect phobia).

Butterflies have taste receptors (chemoreceptors) located on their feet, specifically on their tarsi. This allows them to taste potential food sources by landing on them before extending their proboscis to feed.

Cockroaches are insects, and all insects have 6 legs. This is a basic biological fact about the class Insecta.

Cockroaches are highly resilient and can survive approximately one month without food, though they need water more frequently. They cannot survive a full year without food.

Cockroaches can hold their breath for up to 40 minutes by closing their spiracles (breathing pores). This adaptation allows them to survive underwater or in low-oxygen environments for extended periods. The 40-minute duration is the maximum recorded time under experimental conditions.

Cockroaches have a decentralized nervous system with ganglia (nerve clusters) distributed throughout their body segments, not just in the head. They have one large ganglion in the head acting as a brain, plus smaller ganglia in each body segment that control local functions. This allows them to survive even if they lose their head.

A cockroach has 6 legs, and each leg has 3 main joints that could be called 'knees' (femur-tibia joint and others), giving them a total of 18 knee-like joints. This is a common biological trivia fact about cockroach anatomy. Each joint allows for the flexible movement that makes cockroaches so mobile.

Female cockroaches only need to mate once in their lifetime because they can store sperm in specialized organs called spermathecae. This stored sperm remains viable for months to years, allowing them to fertilize multiple batches of eggs without repeated mating. This reproductive strategy is highly efficient for population growth.

There are approximately 4,000 known species of cockroaches worldwide, though only about 30-40 species are considered pests that coexist with humans. Most cockroach species live in tropical environments and never encounter human habitation. New species are still being discovered by scientists.

Flies have chemosensory receptors (taste buds) located on their feet and legs. This allows them to taste food by simply walking on it, which helps them identify suitable food sources quickly. They don't taste with their mouth, back, or stomach.

Cockroaches can survive for about a week without a head because they have distributed nerve ganglia throughout their body and breathe through spiracles, not through their mouth.

This is a dangerous myth and could cause serious harm. Dog feces can contain harmful bacteria, parasites, and viruses that could lead to severe infections when applied to broken skin or insect bites. Proper treatment involves cleaning with soap and water, using antiseptics, and seeking medical attention if needed.