What is external fertilisation ?
Solution : The fusion of a male and a female gamete takes place outside the body of the female is called external fertilisation. It is very common in aquatic animals such as fish, starfish, etc.
Science
What is an internal fertilisation ?
Solution : Fertilisation which takes place inside the female body is called internal fertilisation. Internal fertilisationoccurs in many animals including humans, cows, dogs and hens.
What is fertilisation ?
Solution : fusion of the female gamete (egg ) and the male gamete ( sperm ) is called fertilisation,
Outline your role as an active citizen in relation to sanitation.
Sanitation means to public health conditions such as drinking clean water, sewage treatment, etc. All the effective actions that help in keeping the environment clean come under sanitation. Every citizen has a responsibility to play in keeping the domestic as well as surrounding clean. Maintain the clean of our surroundings. Manage The domestic sewage system …
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Explain the relationship between sanitation and disease.
Sanitation and disease :- A lots of diseases are caused due to bad sanitation and contaminated drinking water .Bad sanitation help to the growth of harmful microbes, flies and mosquitoes which are the source of spreading many diseases like cholera, typhoid, hepatitis, and dysentery etc.
Name two chemicals used to disinfect water.
Chlorine and DDT are the major disinfectants water .
What is By-products of wastewater treatment ?
By-products of wastewater treatment are sludge and biogas.
What is sewage ?
Wastewater is generated in homes, industries, agricultural fields and in other human activities. This is called sewage.
What is waste water ?
Used water is wastewater. Wastewater could be reused.
Vermi-processing toilet
A design of a toilet in which humans excreta is treated by earthworms has been tested in India. It has been found to be a novel, low water-use toilet for safe processing of human waste. The operation of the toilet is very simple and hygienic. The human excreta is completely converted to vermi cakes — …