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प्रश्न
By which process do green plants synthesize their food?
उत्तर
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संबंधित प्रश्न
Draw a diagram of DNA showing genes.
Define reproduction.
Egg laid after fertilisation is made up of a single cell.
Amoeba reproduces by budding.
A spore-producing organism is ______.
What is the name of the reproductive process :
which involves two parents?
Why are budding, fragmentation and regeneration, all considered to be asexual type of reproduction?
What type of fertilisation takes place in fish?
What type of fertilisation takes place in birds?
Find the odd-one out, giving reason.
Gamete, budding, fragmentation, regeneration.
Write the full form of DNA.
Explain the role of DNA in the process of reproduction of the cell.
Give reason for the following:
Vegetative propagation is practised for growing only some type of plants.
The daughter cells produced by asexual reproduction are genetically identical to the parent cell.
What do you mean by ‘Connecting Links’? Give one example.
Explain the term Reproduction.
Name the factors which take part in this process.
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.
Which of the following types require pollinator but the result is genetically similar to autogamy?
The number of nuclei present in a zygote is _______.
Multiple choice question.
Which of these is the male reproductive organ in humans?
Multiple choice question.
Presence of beard in boys is a _______.
In vitro pollen germination and pollen tube elongation can be induced by ______.
Self-incompatibility is found in flowers of plants _______.
______ is an example of helobial endosperm.
The example of dicot endospermic seed is ______.
Seminal fluid is ______ in nature.
Nervous system develops from ______ of embryonic layer.
What is morula?
What is the use of tablet ‘Saheli’?
Write two types of reproduction in plants.
What will happen if you cut planaria into small fragments?
Why is vegetative propagation practiced for growing some type of plant?
Which of the following is diploid at the time of fertilization in a gametophyte of a normal angiosperm?
Identify the homologous pair.
In the list of animals given below, hen is the odd one out.
| human being | cow | dog | hen |
The reason for this is
