List of practice Questions

The place of origin of humans is:
Peristalsis movement is found in:
Open circulatory system is found in:
The carrier of oxygen in blood is:
The number of pairs of autosomes in humans is:
DNA is the basis of heredity. How?
What is hormone?
What is the role of petals in flowers?
What is environment?
What is glycolysis?
Define nutrition.
Define pollination. Write the effect of rainfall on pollination.
Write about five important sexually transmitted diseases, their causal pathogens, and symptoms.
What is covalent bond? Give two examples of it.
What is an ore?
Why is it necessary to balance a chemical equation?
Why does the aqueous solution of an acid conduct electricity?
What is corrosion? Explain with example.
Write the steps involved in the extraction of metals from ores.
Briefly describe the benefits of rainwater harvesting.
What is sinoauricular node?
What is ozone? Explain its importance.
What is a non-renewable source of energy? Give two examples of it.
Explain scattering of light.
Which quantity remains constant in Ohm's law, when temperature is constant? Explain.