Give the correct term for the following explanation: 1. Cells or filaments that

Question

Give the correct term for the following explanation:

1. Cells or filaments that anchor bryophyte plant bodies to the substrate.
2. The hat-like covering protecting immature moss capsules.
3. Teeth-shaped structures on the moss capsule specialized to enhance spore discharge.
4. The cone of a seedless vascular plant.
5. Clusters of sporangia on ferns.
6. Integument covered megasporangium.
7. Type of plants that produce seed that are not enclosed within a fruit.
8. All the flowering plants belong to this group.
9. Collective term for the calyx and the corolla of a flower.
10. Vase-shaped gametangium in seedless vascular plants in which an egg is produced within a sterile jacket layer of cells.
11. Bryophyte asexual structures.
12. Spores that contain female gametophytes.

Explanation / Answer

1. RHIZOIDS. ( Bryophytes do not have roots , they have simple , multicellular structures called rhizoids which anchor bryophyte plant body to substrate.)

2. CALYPTRA ( The moss sporophyte is called as sporangium which is a bag like structure and bears spores. This sporangium when young is protective by umbrella shaped structure called Calyptra. This is remnant of maternal tissue called archegonium)

3. PERISTOME :( These are diagnostic feature of this group. These structures help in seed dispersal. These teeth bend outward during dry conditions , thus the opening widens to cause release of spores.)

4. STROBILI. ( Seedless vascular plants are club mosses which are most primitive mosses)

5. SORI [singular is sorus]( sporangium is aggregated into clusters called sori)

6. OVULE (Megasporangium with integuments is ovule)

7.GYMNOSPERMS ( Gymnos - naked , sperma - seeds)

8. ANGIOSPERMS ( Seeds are enclosed in the fruits. These are most diverse variety of plants).

9. PERIANTH ( Individual members are tepals. Perianth can be of two types a. petaloid which means petal like and sepaloid which means sepal like) .

10. ARCHEGONIUM

11. GEMMAE CUPS ( Asexual reproduction is accomplished by fragmentation or by tiny sprouts called gemmae which form in special structures called gemmae cups)

12. MEGASPORES ( These are produced in Megasporangium)

HOPE ALL ANSWERS ARE CLEAR :)

6.

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