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Part 4 Audio:
Questions 31-40
Complete the notes below. Write ONE WORD ONLY for each answer.
Tardigrades
Physical appearance
- more than 1,000 species, 0.05-1.2 millimetres long
- also known as water 'bears' (due to how they 31.) and 'moss piglets'
- a 32. round body and four pairs of legs
- claws or 33. for gripping
- absence of respiratory organs
- body filled with a liquid that carries both 34. and blood
- mouth shaped like a 35. with teeth called stylets
Habitat
- often found at the bottom of a lake or on plants
- very resilient and can exist in very low or high 36.
Cryptobiosis
- In dry conditions, they roll into a ball called a 'tun'.
- They stay alive with a much lower metabolism than usual.
- A type of 37. ensures their DNA is not damaged.
- Research is underway to find out how many days they can stay alive in 38.
Feeding
- consume liquids, e.g., those found in moss or 39.
- may eat other tardigrades
Conservation status
- They are not considered to be 40.
