The Electric eel Challenge

Question 1 · multiple choice

Which landscape is most suitable for a wild Electric eel?

clear slow rivers, streams, ponds, and lakes slow rivers, floodplains, and muddy pools in South America estuaries, mangroves, rivers, lagoons, and coastal seas grassland, scrub, gardens, and warm field edges

Question 2 · multiple choice

Which description best matches the natural diet of an Electric eel?

bark, twigs, leaves, and aquatic plants fish, squid, and krill caught underwater fish, crustaceans, amphibians, and small animals mainly insects, with some leaves and flowers

Question 3 · multiple choice

A tracking tag records the daily rhythm of an Electric eel. Which pattern is the best match?

forages mainly by day mostly active at night forages day or night with tides often hunts in dim water and surfaces frequently

Question 4 · multiple choice

A motion camera records an Electric eel. Which description should appear in the observation notes?

undulates a long anal fin to move forward or backward runs and scratches on the ground and flies only short distances walks and makes short hops rather than long leaps walks on jointed legs while carrying a borrowed shell

Question 5 · multiple choice

Which adaptation would a biologist correctly connect to an Electric eel?

skin toxins are obtained partly from chemicals in its wild arthropod diet special electric organs produce weak sensing pulses and powerful hunting shocks gas and liquid in shell chambers regulate buoyancy long narrow body and still posture create twig camouflage

Question 6 · multiple choice

What would a researcher most reasonably record during the breeding cycle of an Electric eel?

eggs are inserted into aquatic plants and nymphs grow underwater an infant rides on its mother and develops slowly over several years adults build a foam nest where eggs and young receive protection one young clings to the mother and learns her feeding routes

Question 7 · multiple choice

How is an Electric eel most likely to organise its everyday social life?

forms herds or managed groups with strong social recognition pairs defend territories with loud calls adults are stationary but live within busy reef communities usually solitary, sometimes concentrating in shrinking pools

Question 8 · multiple choice

A habitat manager explains why the Electric eel matters. Which explanation is accurate?

controls aquatic prey in oxygen-poor floodplain habitats creates wetlands that provide habitat for many other species transfers ocean nutrients to sea ice colonies and feeds predators controls insects and serves as prey for birds and snakes

Question 9 · multiple choice

Which field observation would show an Electric eel defending itself?

flies low and fast to escape danger releases high-voltage pulses that deter predators uses stealth, armoured skin, powerful jaws, and a spinning roll camouflages, spreads wings in a threat display, and strikes

Question 10 · true false

True or False: An electric eel changes kidney and gill function when moving between fresh water and salt water.

True False