Answer:
B
Explanation:
Spirogyra is free-floating green algae present in freshwater habitats such as ponds, lakes, etc. Spirogyra is commonly known as water silk or pond silk. They have a filamentous and unbranched vegetative structure.
or
Spirogyra forms a silk like layer on the water. It is present in abundant amount on the fresh water bodies or slow running water. They are slippery in nature, so are commonly known as pond silk or water silk.
Answer:
Cellular Respiration
Explanation:
Metabolism is the sum of chemical reactions taking place in the living organisms. Cellular respiration is one such metabolic process. Cellular respiration takes place in in the all organisms in which respiratory substrate such as glucose is oxidised completely in presence of oxygen to produce carbon dioxide, water and energy (ATP). Cellular respiration begins in cytoplasm and completes in the mitochondria of the cell. The energy is used to do work.
The oxidation reaction is given below:
C₆H₁₂O₆+ 6O₂ → 6CO₂+ 6H₂O + Energy
Geothermal Energy and Solar Energy
Answer:
Nitrogen cycle works through various stages like, nitrogen fixation, nitrification, assimilation, ammonification, denitrification etc. It is a building block for protein and DNA
Explanation:
Nitrogen is an element abundantly found in the atmosphere, also its building block for proteins as well as nucleic acid i.e. DNA formation. In nitrogen cycle , the nitrogen is being prepared from inert nitrogen. The nitrogen cycle has several processes like nitrogen fixation, in this the inert nitrogen is being converted to organic nitrogen with the help of certain micro-organism.
Nitrification, plants cannot absorb directly nitrogen so bacteria help the plants to convert the nitrogen into ammonia form in this stage. Assimilation, another stage in which plants starts absorbing various forms of nitrogen from the soil.i.e. nitrate, nitrite and ammonium. Ammonification, here plants and animals have nitrogen in there body after death various microbes help in decomposition in this stage. Denitrification, in this stage the return back of nitrogen takes place.
If a lobster loses a claw, it is capable of growing a new one because of mitosis.
