Question

Vay 4

Answer 1

1. Bees pollinate flowers and flowers provide nectar for the bees. "M"

2. A tapeworm attaches to the intestines of  animals and absorbs their nutrients. "P"

3.Tiny birds helping to keep a crocodile's  mouth clean by eating scraps of

food caught between the crocodile's teeth. "M"

4. A tree frog using a plant for shelter from the  rain. "C"

5.  A tick feeding on the blood of a deer. "P"

Explanation:

Mutualism : If 2 or more species are having an association and the relation is useful to both the organisms in relation, is termed 'mutualism'.

eg: In pollination bees transfer pollens and help reproduce flowering plants and bees get nutrition from the nector.

The plover bird comes to crocodile's mouth as it gives invitation to it to cleanse its mouth and food stuck between the teeth because crocodile cannot go flossing. In turn plover birds gets its food. In this relation both bird and crocodile benefited.

Commensalism: This is a relation between two organisms or species in which one partner is benefited while other neither gets harmed nor benefited.

eg :A tree frog utilizes the shade of plants and hide in the plant to get saved from prey in turn plant does not get anything.

Parasitism: In this association parasite lives in the organism and benefits from it but host gets harmed with this association.

eg: The tapeworm living in intestine of animals attaches to draw nutrition in turn animal gets disease caused by it.

Tick receive nutrition and the deer gets the disease.