Quiz Chapter 5 Examples of marine ecosystems Quiz

Chapter 5 Examples of marine ecosystems

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1. Give two reasons why humans destroy mangroves. [2]

oil pollution

timber for building materials

to make room for agriculture and buildings

ocean acidification

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2. Suggest reasons why scientists could not kill more COTS.
Do not refer to cost in your answer. [2]

scientist could not find/reachthem

COTS are immune to poison

scientists couldn't identify the

time consuming

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3. Describe how red mangrove trees stabilize muddy shores. [3]

prop roots are a barrier to waves

prop roots cause sedimentation and prevent erosion

have large roots with pneumatophores

red mangroves have prop roots which absorb wave energy

prop roots decrease the speed of water movement

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4. Describe how a propagule is different from a seed. [1]

seeds germinate attached to the tree

propagules germinate attached to, tree / parent

propagules develop attached to, tree / parent

seeds are viviparous

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5. Propagules are an adaptation to living in water with a high concentration of salt.
Describe one other adaptation of red mangrove trees to living in water with a high concentration of salt. [1]

roots remove salt

use a sacrificial leaf

roots filter out salt

use prop roots to stay out of salt water

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