1. Differentiate between:

(a) Blood is pumped out the heart and the cells and tissues are directly bathed in the open circulatory system whereas the closed circulatory system is circulated throughout the body with the help of series of vessels

(b) Laying of fertilized and unfertilized eggs are known as oviparous whereas giving birth to young ones is viviparous

(c) When a larval stage is absent in the development of the organism, it is direct development whereas the larval stage is present in the development of the organism which does not resemble the adult is called indirect development.