15 Endocrine Glands and their Functional Roles in a Rabbit
All endocrine structures develops from epithelia or nervous tissues, or from both. It is noteworthy that some structures described here have other important functions, e.g.,…
All endocrine structures develops from epithelia or nervous tissues, or from both. It is noteworthy that some structures described here have other important functions, e.g.,…
Due to its great importance as a pollinator of flowers and as a producer of honey, the honey bee, Apis mellifica, is described as a…
The class Insecta (insects) is split into two sub classes and twenty – four orders. Here, a very concise outline of the main diagnostic features…
The cabbage white butterfly exhibits a fairly typical lepidopteran life history. This butterfly is scientifically known as Pieris brassicae. The adult butterflies appear in May…
What is Apospory and Apogamy? Before we describe these terms, we must first understand what homospory and heterospory mean. Homospory describes the condition in which…
The concept of autotomy is used to describe a defensive mechanism employed by animals to evade predators by way of distracting them or escaping from…
Students sometimes experience difficulty in deciding whether a particular specimen is a fruit or a seed. Fruits and seeds have become quite a ‘confusing'(in biological…
Growth occurs by division and consequent enlargement of the cells of all tissues except the nervous tissues in crayfish. No increase in size is apparent…
Most of the investigations into annelids have been carried out on polychaetes, particularly several species of nereids. It has been shown that growth, reproduction, regeneration…
It must be remembered that apart from evolutionary changes in structure and function, the rise of the mammals practically coincides with the rise of the…