Examine the figure below and select the right option giving all the four part (A, B,C and D) correctly identified.
A |
B |
C |
D |
Archegoni Ophore |
Female thallus |
Gemma cup |
Rhizoids |
A |
B |
C |
D |
Archegoni |
Female thallus | Bud | Foot |
A |
B |
C |
D |
Seta |
Sporophyte | Protonema | Rhizods |
A |
B |
C |
D |
Seta |
Sporophyte | Protonema | Rhizods |
In cloning of cattle a fertillized egg is taken out of the mother’s womb and
the egg is divided into 4 pairs of cells which are implanted into the womb of other cows
in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cow
in the eight cell stage the individual cells are separated under electrical field for further development in culture media
in the eight cell stage the individual cells are separated under electrical field for further development in culture media
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
Three
Four
Nine
Nine
Select the correct statement regarding reproduction
Mating in dogs is synchronised with lunar cycle.
Salamanders always have internal fertilisation.
In Trygon, the male introduces sperms into female through a modified pelvic fin.
Catla has internal fertilisation
Which form of reproduction is correctly matched?
Euglena transverse binary fission
Paramecium longitudinal binary fission
Amoeba multiple fission
Plasmodium binary fission
Assertion: Many plants are propagated vegetatively even though they bear seeds.
Reason: Potatoes multiply by tubers and apple by cutting.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion
The most common form of asexual reproduction in plants is called vegetative propagation. It is the formation of new plants from vegetative units (propagules) such as buds, tubers, rhizomes, roots, stem, leaf etc. Besides the natural methods of vegetative propagation, there are a number of techniques for artificial vegetative propagation of economically and aesthetically important plants. Potatoes are produced by tubers and not by seeds. Stem tubers are found in potato and artichoke. They have buds in the region of nodes or eyes for vegetative multiplication. Root cuttings are used in propagation of lemon, apple, orange, blackberry etc.