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A saprophyte or saprotroph is an organism which gets its energy from dead and decaying organic matter. This may be decaying pieces of plants or animals.

The fish possesses scales while the frog or toad do not. Toads, like all amphibians, do not possess scales; instead, they have moist, permeable skin covered with mucous glands.

Tadpoles have soft skins and do not possess shells.

Pecking is a form of feeding for birds not movement.

The feather contains a vane, afterfeather, calamus, barb, rachis.

Regulates body temperature. Excretes toxic substances with sweat. Protection of the body from harmful effects of the sun and radiation. Prevents penetration of toxic substances.

Boron (B) is not required by plants in high amounts, but can cause serious growth problems if it is not supplied at appropriate levels.

A potometer is a scientific instrument used to measure the rate of water uptake in a leafy shoot, which is closely related to the rate of transpiration (water loss) from the plant. In other words, this is to test for rate of transpiration of the plant. This process of water loss from plants, is influenced by both internal and external factors, including temperature, humidity, light intensity, air movement, leaf structure, and water availability. However, the plant when kept in the cupboard will be deprived of those factors, thereby prolonging the time taken for transpiration to occur. Consequently, the longest time which is 30 seconds is the best option.

Trypsin is a serine protease from the PA clan superfamily, found in the digestive system of many vertebrates, where it hydrolyzes proteins. Trypsin is formed in the small intestine

When a plant cell is put in highly concentrated solution, it increases the pressure on the cell. Hence, plasmolysis holds in a highly concentrated solution.

Cholera is a water-borne disease hence, it cannot be contacted by the farmer.

Blood circulation holds in the circulatory system, the liver is a part of the digestive system. Hence, the liver can't be a part of the circulation process.

The correct answer is "the tip of the seedling may have been covered". If the tip of the seeding is covered, it would prevent the seedling from receiving the light signal, which is necessary for phototropism. As a result the seedling will continue to grow erect, without bending towards the light. On the other hand, if only the tip of the seedling received the light, it would like respond by bending towards the light source.

Wind-pollinated grains are non-sticky and light, to ensure they can be blown by the wind.

A germinating seed requires oxygen, which is essential for cellular respiration to produce energy. This energy is vital for the seed to grow and develop, powering the metabolic activities needed for sprouting. Oxygen allows the seed to break down stored carbohydrates through oxidation, releasing energy in the form of ATP.