Discuss how adaptation and modification in stem, root and leaf have made Angiosperms the dominant species in whole of the plant kingdom.
Plants which live in extreme environments have adaptations to control their transpiration rate. Most modifications are adaptations to very dry (arid) environments. Water plants have no problem of water shortage. They do not need adaptations to conserve water as desert plants.
Plants modified to cope with a lack of water are called xerophytes. Living in deserts where water is scarce and evaporation is rapid, or in windy habitats where evaporation can also be rapid, they have to cut down water loss.
1. Marram grass (Ammophila)
Very long roots to search for water deep down in sand dunes.
Leaves that roll up in dry weather to increase humidity around stomata, reducing transpiration.
Sunken stomata to create high humidity and reduce transpiration.
Fine hairs around stomata, reducing air movement so
__________ ___ _________ _____ ___.
________ _________ ______ __________ ____ ___ ________ ___ ________ ______ ______.
_______ _____ ____ _____ ____ ______ _____.
______ _________ _________ _______ ___ ______ ________ ______ _____ ______ ___ _____.
___ ____ ______ _______ _____ _________.
__________ ______ _______ ________ ______ ___ _____ __________ _________ ____.
___ ________ __________ ______ ____ _________ ______ _________ ________ __________.
______ ____ ___ _______ ____ ________ _______ _______ ________.
____ ____ ___ ______ ________ ________ _____ __________.
_______ ___ ___ _______ __________ ___ _____ _________ _______.
________ ____ _____ ______ _______.
___ _________ _________ ______ ________ _________ _________ ____ _______ __________ ______ __________.
____ ________ _____ __________ ____ ______ ________ _________ ______.
___ ____ ________ ___ _____ _________ ________.
_____ _________ ___ ____ _______ ____ _____.
_______ __________ _______ ______ ___ ________ ______.
_____ ___ __________ _________ ___ ___ ____ ___.
___ ___ _____ _________ ___ ______ ________ __________ ___ _________ ____.
_________ ______ __________ _________ ________ ______ __________ __________ __________ ___ __________ _________.
__________ ________ ______ ________ _____ ________ _____.
_____ ___ ________ ___ ___ __________ ________ ______.
___ ________ ____ _________ _________ _________ _________ __________ ____ __________.
____ ______ ___ ___ ______.
_____ ________ ____ _________ ________ ______ _____ ______ _____ ___ ____.
__________ ___ ______ ______ _____ __________ _____ __________ _____ ________ _____.
- Solved Assignments
- Study Notes
- Guess Papers
- Question Papers
✓ Unlock up to 60% of the answer
✓ No payment required