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प्रश्न
Self-incompatibility is found in flowers of plants _______.
विकल्प
Calotropis
maize
Thea
Gloriosa
उत्तर
Self-incompatibility is found in flowers of plants - Thea.
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संबंधित प्रश्न
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Why are budding, fragmentation and regeneration, all considered to be asexual type of reproduction?
What is a clone? Why do offsprings formed by asexual reproduction exhibit remarkable similarity?
Match the organisms given in column I with the methods of reproduction/propagation given in column II :
| Column I | Column II | |
| (i) Plasmodium | (a) Spore formation | |
| (ii) Spirogyra | (b) Leaves | |
| (iii) Jasmine | (c) Regeneration | |
| (iv) Apple tree | (d) Budding | |
| (v) Bryophyllum | (e) Binary fission | |
| (vi) Potatoes | (f) Layering | |
| (vii) Rhizopus | (g) Fragmentation | |
| (viii) Hydra | (h) Tubers | |
| (ix) Planaria | (i) Cuttings | |
| (x) Leishmania | (j) Multiple fission | |
| (xi) Sugar cane | (k) Grafting | |
| (xii) Rose |
What is meant by reproduction?
Name two animals which undergo internal fertilisation?
The characteristics transmitted from parents to offspring are present in :
(a) cytoplasm
(b) ribosome
(c) golgi bodies
(d) genes
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
What is the role of the seminal vesicles and the prostate gland?
By which process do green plants synthesize their food?
Answer the following question.
The growing size of the human population is a cause of concern for all people. The rate of birth and death in a given population will determine its size. Reproduction is the process by which organisms increase their population. The process of sexual maturation for reproduction is gradual and takes place while general body growth is still going on. Some degree of sexual maturation does not necessarily mean that the mind or body is ready for sexual acts or for having and bringing up children. Various contraceptive devices are being used by human beings to control the size of the population.
(a) List two common signs of sexual maturation in boys and girls.
(b) What is the result of reckless female foeticide?
(c) Which contraceptive method changes the hormonal balance of the body?
(d) Write two factors that determine the size of a population.
If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes?
In vitro pollen germination and pollen tube elongation can be induced by ______.
The example of dicot endospermic seed is ______.
Explain the term reproduction.
In the list of animals given below, hen is the odd one out.
| human being | cow | dog | hen |
The reason for this is
The term metamorphosis is not used while describing human development. Why?
Observe the following figures.
 |
 |
 |
|
| (a) | (b) | (c) | (d) |
- Identify the stages (a) to (d) in figure during development of human baby.
- Arrange the stages in correct sequence of development.
- Explain the development that takes place in any one stage.
Give reason for the following:
All multicellular organisms cannot give rise to new individuals through fragmentation or regeneration.
Choose the correct meaning of reproduction.
