Question

Which of the following statements are incorrect about thallophyta?
i. Sex organ are unjacketed and one-celled gametangia
ii. The vascular system is well developed
iii. An embryo stage is absent
iv. The plant body is differentiated into roots, stem and leaves.
A. i and iii
B. i and iv
C. ii and iii
D. ii and iv

Answer 1

Hint: Thallophytes are the plants that belong to the group of non-motile organisms and they are polyphyletic. Thallophytes are that group of the plant kingdom which consists of fungi, lichens and algae and sometimes bacteria, slime mould and Bryophyta.

Complete answer:
Thallophyte is known by having an undifferentiated body which is known as thalli. They mostly belong to the marine ecosystems. Thallophyta has the primitive type of plant life which shows a simple plant body. The thallophyta plants have a concealed type of reproduction and because of this reason, they are involved in the group Cryptogamae. The sex organ of thallophyta is simple and single-celled. It does not contain any vascular bundles and xylem and phloem.
The main importance of thallophyta is that after the photosynthesis they produce glucose and some part of it is used just after the production. They are autotrophic and they store food as starch. The plant body of thallophyta are not divided into root, stem and leaves. The mode of nutrition of the plant is photosynthetic, parasitic and saprophytic.
So, the incorrect statement about thallophyta is i.the vascular system is well-developed . ii.the plant body is differentiated into roots, stem and leaves.

Note: They generally have both sexual and asexual type of reproduction. The asexual reproduction is done by spore formation. The name of the thallophytes is Ulothrix, Spirogyra etc.