Form 4: 6.1 Endoskeleton, exoskeleton, hydrostatic skeleton

The diagram shows some invertebrates. What is the support system for animals?

• Endoskeleton

• Exoskeleton

• Hydrostatic skeleton

What is the support system of vertebrates as shown in the diagram.

• Endoskeleton

• Exoskeleton

• Hydrostatic skeleton

What is the type of skeleton in a snake?

• Endoskeleton

• Exoskeleton

• Hydrostatic skeleton

What is one of the characteristics of exoskeleton?

• Limits the size of animals

• Bones can vary (change) in size to support mass

• Great flexibility

• Fluid in shape

The animals that have exoskeleton will shed the skin repeatedly until they reach adulthood as shown in the diagram. The process of shedding or moulting the skin is called as __________

The diagram shows a growth curve of an insect with exoskeleton. Tick TWO statements that explain the growth of the insect.

• The vertical part in the curve shows a rapid growth

• The vertical part in the curve shows a zero growth stage

• The horizontal part (I, II, III, IV, V) shows a rapid growth

• The horizontal part (I, II, III, IV, V) shows the zero growth stage.

Exoskeletons are soft. True of false?

• TRUE

• FALSE

Endoskeletons are skeletons outside the body. True or false?

• TRUE

• FALSE

Animals with exoskeletons will always increase their body lengths even after adulthood. True or false?

• TRUE

• FALSE

The hydrostatic skeleton like a worm maintains and controls its body shape. True or false?

• TRUE

• FALSE