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22 questions
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
What is a major difference between a hydrostatic skeleton and an endoskeleton?
A hydrostatic skeleton is located inside the body and the endoskeleton outside.
A hydrostatic skeleton is found in worms and an endoskeleton in invertebrates.
An endoskeleton is located inside of the bodies of vertebrates and are composed of bone, while hydrostatic skeletons are fluid filled skeletons.
Both ( option 1 and 2)
What is the exoskeleton made of ?
Bone
Chitin
Fluid
None of the above
Identify the type of skeleton that the following animal possesses and at least one advantage and disadvantage. (APP)
Exoskeleton. Adv: Reduces water loss disadvantage: the growth of the animal is limited.
Hydrostatic skeleton: advantage: does not require any specialized support structures dis: the animal has to moult in order to grow.
Endoskeleton. Adv: protects internal organs. dis: takes a long time to repair.
Hydrostatic skeleton. Adv: does not require attachment for muscles. dis: limited in size and speed.
What is the role that chitin plays in an exoskeleton?
It fills the body cells and cavities in the body.
It enables the exoskeleton to grow and stretch.
It forms body plates with flexible joints which allows for muscle attachment.
None of the above.
Lack of protection is a disadvantage for which skeleton type? (ANA)
Endoskeleton
Hydrostatic skeleton
Exoskeleton
None of the above
What characteristics supports exoskeleton?
Limits the size of the animals.
Great flexibility.
Bones can vary in size to support mass.
Fluid shape.
why do aquatic vertebrates have a smaller endoskeleton compared to land vertebrates of the same body mass?
they have exoskeleton to support their body weight
they are mostly supported by water bouyancy
their fatty tissues support their weight
they move very slowly and are inactive
in the water, this animal is supported by....
hydrostatic skeleton and endoskeleton
water bouyancy and exokeleton
exoskeleton and hydrostatic skeleton
hydrostatic skeleton and water bouyancy
Animal X has very weak pectoral and pelvic girdles. Which of the following is an example of animal X?
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
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
Tortoises and turtles have both endoskeletons and exoskeletons
TRUE
FALSE
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