Form 2 : Support and Movement

Animal X has very weak pectoral and pelvic girdles. Which of the following is an example of animal X?

• Camel
• Whale
• Cat
• Monkey

Which of the following organisms are supported by a hydrostatic skeleton?

• soft-bodied vertebrates
• Invertebrates with hard exoskeletons
• Soft-bodied invertebrates
• Vertebrates with hard skeletons

Whale can grow to enormous sizes because

• their endoskeletons are very strong
• they have low body density
• their body weight is supported by buoyancy of water
• their exoskeleton is built of calcium

Which of the following animals are supported by both a hydrostatic skeleton and the buoyancy of water?
i starfish
ii jellyfish
iii prawn

• ii only
• i and ii only
• ii and iii only
• i, ii and iii

Figure shows the cross-section of the stem of a plant. Which of the following have stems similar to one shown above?

• water hyacinth
• mustard plant
• mangrove tree
• balsam plant

Which of the following pairs of organisms and way of support is matched correctly?

• Orchid  : buttress roots
• Rattan  : thorns
• Bougainvillea  : tendrils
• Balsam  : woody tissue

The air sacs enable it to 

• make food
• float in water
• transport water
• absorb sunlight

Which of the following statements are true regarding aquatic vertebrates?
i) they have very big pelvic girdles
ii) they have very strong pectoral girdles
iii) they are supported by the buoyancy of water

• iii only
• i and ii only
• ii and iii only
• i, ii and iii

Which of the following plants is supported by turgor pressure in its cell?

• rubber tree
• balsam plant
• hibiscus plant
• rambutan tree

Whales will die if they are washed ashore. his is because
i) they enormous body weight will press down on their organs and crush them.
ii) their body temperature becomes very high on land
iii) they cannot breathe on land 

• i only
• iii only
• i and ii only
• i,ii and iii