The outer skin most of the crustaceans are made up of a carbohydrate. This carbohydrate is
The members of phaeophyceae are commonly called ............... algae.
Children especially in western countries who receive very little sunshine suffer from
Which of the following is biodegradable?
In male reproductive system, the testes are situated outside the abdominal cavity within a pouch called __________.
Which of the following transports water from the roots of the plant to its leaves?
In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called ____________.
The male sex hormone is
In dicots, the pollen grain possess
A pair of contrasting characters controlling the same trait is called