Question

42. 1) What is Placenta ? Write two functions of placenta.
2) Rajeshwari explained the Role of Butterflies in cross pollination is very
important to her students.
a) How is it ? can you explain ?
b) Write another two organisms which helps in pollination.

Answer 1

Hey!!

1) placenta is a special tissue attached to inner uterine wall which the embryo gets embedded to get nourishment.

Role---

# it acts as endocrine tissue as it releases hormones like hcg,hpl etc.

# it helps in nourishment and removal of waste material from foetus.

2)a) the insect pollinated flowers are colourful and attractive,thus butterflies feed them for nectar and hece they carry pollen grains from one flower to another.

b) other organisms are honeybee, grazing cattels etc.

Hope this helps you