Crab adaptations 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about adaptations of crabs. Nutrition: crabs can be predators, scavengers and some even eat plant material. Gas exchange: gills. Legs can be modified to help perform other functions. Question 2Change answer a) Most crabs like the one shown have their abdomen tucked underneath. What is the advantage of this? a) Most crabs like the one shown have their abdomen tucked underneath. What is the advantage of this? Question 2Change answer b) The front legs are modified as claw-like structures. Give two ways this helps the crab. b) The front legs are modified as claw-like structures. Give two ways this helps the crab. 1. 2. Question 2Change answer c) An adaptation is a feature of an animal and how this feature helps its survival. Apart from those adaptations mentioned in a) and b) describe two other adaptations of this crab. c) An adaptation is a feature of an animal and how this feature helps its survival. Apart from those adaptations mentioned in a) and b) describe two other adaptations of this crab. 1. 2. Task administration: This task can be completed with pencil and paper or online. Level: 5 Curriculum info: Science, Knowledge, Living World Keywords: ecology, adaptation, crabs Description of task: Using a diagram of a crab, students explain some of the crab's adaptations. Curriculum Links: Science capabilities The capabilities focus is brought about by the conversations you have and the questions you ask Capabilitiy: Use evidence This resource provides opportunities to discuss using evidence (from a labelled diagram and text) to make an inference. Science capability: Use evidence Science capabilities: Use evidence Answers/responses: Y10 (11/1999) a) Its position prevents damage to it/it is more vulnerable but is 'hidden'. moderate b) It can be used for defence against other animals. Used for catching/eating food. 2 correct – moderate 1 correct – very easy c) Any 2 of: 5th leg pair modified for swimming eyes on stalks for better all round viewing hard carapace for protection flat so can easily get under rocks eyes retractable for protection any other acceptable adaptation 2 correct – very difficult 1 correct – moderate Pitcher plant Lizard's tail Eye see Possums' coats Leaves Emperor penguins in Antarctica Oystercatchers Adaptations in fish Slaters Kererū II Archey's Frog Pepeketua - New Zealand native frogs Pigeon milk Crown of Thorns starfish II
