Question

8
f) Give reasons for the following:
i. Life cannot exist on earth in the absence of photosynthesis PA
ii. Tigers, leopards, lions, and frogs do not eat plants yet they cannot survive without plans
iii. Parasites are harmful for the host plant.
iv. Saprophytes are cleaners of our environment.pg
v. Fungi can be useful as well as harmful for humans. Po
vi. The Venus's flytrap and pitcher plant perform photosynthesis, yet they wrap insects
vii. There is no need to put nitrogenous fertilizer in the field with leguminous plants
Look at the given pictures and identify the type of nutrition found in them.​

Answer 1

Answer:

i) In the absence of photosynthesis, plants will not able to make food. plants are the only source of food for all the organism directly or indirectly

so ultimetly in the absence of food all organism die

ii) They do not eat plant but indirectly they depemd on plant for their food. ex. they take their food from heterotroph who eat plants for their survival so in this case animals like tigers, lion , frog depend on plant. so they are able to survive.

iii) parasites take nutrientes from plants which decrease

iv) Saphrophytes derive their nutrients from dead and decaying matter by converting them into soluble form which helps in cleaning the environment.

v) Fungi is useful as it helps in making antibiotic to kills pathogen, it also helps in cleaning environment as it is a decomposer.

it is harmful in several ways-

it spolis food, causes many disease to plants etc

vii) Their is no need to put nitrogenous fertilizer in the field with leguminous plants because in the nodules of the leguminous plants their lives ribosomes which helps in coverting atmospheric nitrogen into the soil and in return take food from the plant. so leguminous plants are rich in nitrogen.