A student observes an aquatic plant with an undifferentiated body exchanging substances directly with the surrounding water. To which plant group does it most likely belong?
Thallophyta
Thallophyta (the algae) are plants whose body is a thallus: it is not differentiated into root, stem and leaves, and it has no vascular tissue. They are mostly aquatic, so each cell can take in water, gases and minerals directly from the surrounding water.
An aquatic plant with an undifferentiated body exchanging substances directly with water therefore matches Thallophyta.
Bryophyta (mosses, liverworts) have a body differentiated into stem-like and leaf-like parts and mostly live on damp land. Pteridophyta (ferns) have true roots, stems, leaves and vascular tissue. A lichen is a symbiotic association of an alga and a fungus, usually found on rocks and tree bark, not a plant group of this kind.
Hence, Thallophyta.
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Important Questions from Botany
Which of the following is a type of nutrition?
I. Heterotrophic
II. Autotrophic
Part of N 2cycle that is opposed to N 2fixation is:
Which among the following is the reproductive part of a plant?
Fibres (Adventitious) roots are found in :
In which Part of the flower does Meiosis take place ?
