Answer:
A. Uric acid
Explanation:
Most water is conserved in the body of an organism which excretes uric acid as urinary waste or in short we can say that least water is lost from the body of organisms which excrete uric acid. Based on the habitat and niche, body of various organisms are adapted to produce either ammonia, urea or uric acid as waste products. Among ammonia, urea and uric acid, <u>uric acid is least toxic and also requires very less water</u> in order to get excreted out of the body.
Birds spend most of the time in sky flying high, in such scenario they do not get enough excess to water because within sky there are no water resources so it is their utmost necessity to conserve water in the body. They get access to water resources only when they come back to land which is not a regular practice for them. This is the reason why birds excrete uric acid as nitrogenous waste product.
These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
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The organic waste from one organism may provide shelter for one organism or may be a source of energy for another organism.
An example is the excreta of herbivore animals is used by dung beetles as breeding chambers and source of food. Organic litter from plants also offer shelter and shade (from direct sunlight) for small organisms such as earthworm and crickets.
Answer:digestive system
Explanation:
It's after mastication that enzymes act on the food to convert it into an assimilable manner
