Question

(a) State three (3) mechanisms adopted by petals in attracting pollinators (b) Briefly discuss the role of human in ecosystem disruption. (c) State the differences between epiphytes and parasites (a) Flowers are made up of four (4) basic parts. Name them and briefly explain their functions (b) Why is interaction between angiosperm and pollinators considered mutualistic? (c) Outline 5 functions of the kidney. eas la Sepalalal crion wea8te Uea

Answer 1

a) 3 mechanism by which petal attracts pollinators are:

1. Petal colour : pollinators see only a few colours . So, petals express those colours only so that the pollinators gets attracted to that specific coloured petals over others.

2. Petal scent : petals also have definite scent that helps them to attract specific pollinators.

3. Petal shape : we know that different plant species has different petal shape. They mimic the shape of the insect or oollinators they want to attract and so they trick them to pollinate them .

b) there are many ways in which humans disrupted the ecosystem. The main 2 reasons are :

1. 1.Polluti : As the human activity increases, pollution increases. One of the most common example is burning of fossil fuel, which increases carbon dioxide concentration in the atmosphere, leading to global warming.

2 . population : with increase in population, human's need for land increases, leading to cutting of trees which directly hampers our biodiversity.

c) Epiphytes are non-parasitic plants which grows around the host, but donot derives its nutrients by killing the host. Instead it gets its nutrients from the air around it whereas parasites derives its nutrients from the host , killing it in the process.

a) 4 basic parts are :

Sepal : the green coloured of the plant that protects the bud.

Petal : the bright coloured part of the plant that attracts pollinators which in turn helps in the pollination .

Stamen : it produces the pollen.

Carpel : it consists of the stigma, ovary.