Interactive Science

What is the type of skeleton in a snake?

• Endoskeleton

• Exoskeleton

• Hydrostatic skeleton

Choose two organisms that are supported by hydrostatic skeleton.

• Fish

• Leech

• Grasshopper

• Star fish

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The growth curve of all organisms basically is .................... in shape.

• rectangle

• sigmoid

• circle

What is the process marked as X ?

• Growth

• Expansion

• Ecdysis

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The name of muscles in earthworm is _______________.

• longitudinal muscle

• biceps

• triceps

• circular muscle

Which characteristics belong to birds?

• Their bones are hollow and light

• Their body weight are supported by the pectoral girdle and pelvic girdle.

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

• Camel
• Whale
• Cat
• Monkey

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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

Two factors that affect the stability of an animal:

• volume of base

• centre of gravity

• base area

• centre of point

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The Skeletal System does what?

• Support your body

• Help your body move with muscles

• all of the above

• protect your organs