33. What is an angiosperm, and what evolutionary advantage does it have?

Angiosperm: It is a type of plants which produces flowers and seeds which are enclosed in ovary. Angiosperm is also called flowering plants. Both male part i. e. stamen and female part i. e. carpel are present on the flower of the angiosperm plants. Sperm of male combine with egg of female produce seed.

Evolutionary advantages of Angiosperm :

1) The Angiosperm produces fruits which protects seed.

2) Seed coat provides protection from the external environment.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.