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प्रश्न
Give biological explanations for All the food chains begin with green plants.
Give biological explanations for the following:
All the food chains begin with green plants.
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उत्तर
Green plants are the only organisms that are able to synthesise food from CO2 and H2O in the presence of chlorophyll and sunlight. However, animals depend upon plants for food. Therefore, all food chains begin with green plants.
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संबंधित प्रश्न
Describe the function of placenta.
The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:
- Label the parts numbered 1 to 3 in the diagram.
- Mention any two functions of the part labelled 2 in the diagram.
- Explain the significance of the part numbered 3 in the diagram.
- Define the term ‘Gestation’. What is the normal gestational period of the developing human embryo?
- Mention the sex chromosomes in a male and female embryo.
Write the names of female sex hormones.
What is puberty?
Which structures in human female are equivalent to the following structures in the male?
- testes
- vas deferens
- penis
In each case say in what respect the structures are equivalent?
What joins embryo to placenta in mother's body?
Write two examples of sexually transmitted diseases caused by bacteria.
Complete the following statement by choosing the correct alternative:
Sterilization in female is due to cutting off of ______.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A zygote is the product of the fusion of male and female gametes.
State the Location:
Uterus
