Calyptra develops from
Venter wall of archegonium
Outgrowth of gametophyte
Neck wall of archegonium
Paraphysis of the archegonial branch
A.
Venter wall of archegonium
Calyptra is a covering developed from the ventre of archegonium in bryophytes and pteridophytes. It acts as a transpiration shield around the immature capsule and provides protection to the young capsule.
Indian rhinoceros are protected in
Gir forest
Kaziranga National Park
Bandipur National Park
Ranthambore National Park
Which ofthe following is not true for a species?
Members of a species can interbreed
Variations occurs among members of a species
Each species is reproductively isolated from every other species
Gene flow does not occur between the populations of a species
Match items in Column- I with those in Column- II
Column- I | Column- II |
A. Peritrichous flagellation | 1. Ginkgo |
B. Living fossil | 2. Macrocystes |
C. Rhizophore | 3. Escherichia coli |
D. Smallest flowering plant | 4. Selaginella |
E. Largest perennial alga | 5.Wolffia |
Select the correct answer from the following
A B C D E
2 1 3 4 5
A B C D E
5 3 2 5 1
A B C D E
1 2 5 3 2
A B C D E
3 1 4 5 2
Match the following Columns.
Column I (Cell Organelle) | Column II (Discovered by) |
A. Ribosome | 1. Fontana |
B. Nucleolus | 2. Tolbert and Yamazaki |
C. Glyoxysome | 3. Palade |
D. Peroxisome | 4. Beevers |
A – 1; B – 4; C – 2; D – 3
A – 3; B – 4; C – 1; D – 2
A – 1; B – 3; C – 2; D – 4
A – 3; B – 1; C – 4; D – 2