A) Body shape B) Eye color C) Claw size D) Leg length
A) True crabs have a reduced abdomen tucked under the cephalothorax B) False crabs live only in freshwater C) False crabs are larger D) True crabs have more legs
A) Round and bulbous B) Long and narrow C) Star-shaped D) Broad and flattened
A) Prosoma B) Carapace C) Abdomen D) Cephalothorax
A) Chelipeds B) Pleopods C) Uropods D) Pereiopods
A) Three B) Six C) Four D) Five
A) Swimming B) Camouflage C) Digging D) Reproduction
A) By the length of the legs B) By the shape of the abdominal flap C) By the color of the carapace D) By the size of the claws
A) Male crab B) Female crab C) Hermaphrodite crab D) Juvenile crab
A) Male crab B) Hybrid crab C) Female crab D) Immature crab
A) Waste removal B) Sensory perception C) Food digestion D) Oxygen extraction
A) On the abdomen B) Within the gill chambers beneath the carapace C) Externally, attached to the body D) On the legs
A) Respiration B) Digestion C) Protection D) Locomotion
A) Large, symmetrical claws B) Long legs relative to their body size C) Brightly colored carapace D) Paddle-like swimming legs
A) Hermit crabs B) King crabs C) Stone crabs D) Ghost crabs
A) Hermit crab B) Snow crab C) Box crab D) Fiddler crab
A) Brightly colored walking legs B) A flattened, shovel-like carapace C) One greatly enlarged claw in males D) The ability to climb trees
A) Decorator crab B) Coconut crab C) Mud crab D) Pea crab
A) Metamorphosis B) Regeneration C) Ecdysis D) Osmoregulation
A) To reproduce B) To change color C) To grow larger D) To shed parasites
A) A misnomer, they are more closely related to spiders and scorpions. B) An accurate descriptor, it's a type of crab. C) They were once classified as crabs but have since been reclassified. D) A regional term for a certain type of true crab
A) Internal organ structure B) Claw shape C) Carapace ornamentation D) Leg structure
A) Marginal setae B) Epipods C) Rostral spines D) Branchial ridges
A) Omnivorous B) Herbivorous C) Carnivorous D) Detritivorous
A) Modified gill chambers B) Ability to absorb oxygen through their skin C) Specialized lungs D) Waterproof carapace
A) Sensing vibrations B) Defense C) Feeding D) Swimming
A) King crabs B) Hermit crabs C) Spider crabs D) Shore crabs
A) Cyprid B) Megalopa C) Zoea D) Nauplius
A) Red king crab B) Blue crab C) Snow crab D) Dungeness crab
A) They don't communicate B) Primarily through vocalizations C) Only through tactile signals D) Through visual and chemical signals |