The soil organisms are

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Question

(D) Soil organisms include a diverse range of life forms such as bacteria,fungi,earthworms,and insects. These organisms play a dual role in the ecosys

Vedclass · Accepted Answer

Both harmful as well as useful to plants growing in the soil

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(D) Soil organisms include a diverse range of life forms such as bacteria,fungi,earthworms,and insects. These organisms play a dual role in the ecosystem. They are useful because they decompose organic matter,recycle nutrients,and improve soil structure,which promotes plant growth. However,they can also be harmful,as some soil-borne pathogens (such as certain fungi and bacteria) cause diseases in plants,and some soil insects may feed on plant roots. Therefore,soil organisms are both harmful as well as useful to plants growing in the soil.

Column-$I$	Column-$II$
$(A)$ Found in some amino acids	$(1)$ $Mg$
$(B)$ Required for photolysis of water	$(2)$ $I$
$(C)$ Not important for plants	$(3)$ $S$
$(D)$ Structural component of chlorophyll	$(4)$ $Mn$

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Match the following columns:
Column-$I$ Column-$II$
$(A)$ Found in some amino acids $(1)$ $Mg$
$(B)$ Required for photolysis of water $(2)$ $I$
$(C)$ Not important for plants $(3)$ $S$
$(D)$ Structural component of chlorophyll $(4)$ $Mn$

Analogy type questions:
$(1)$ Nitrogenase : Oxygen sensitive :: Leghaemoglobin : ........
$(2)$ Microbe on roots of Alnus : Frankia :: Roots of leguminous plants : Rhizobium :: Denitrification : Pseudomonas :: Biological nitrogen fixation : ........

Analogy type questions:
$(1)$ Manganese toxicity : Brown spots surrounded by chlorotic veins : Molybdenum deficiency : ........
$(2)$ Conversion of nitrogen to ammonia : Nitrogen fixation : Oxidation of nitrite to nitrate : ........

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