A freshly hatched tadpole larva has a limbless body divide into an ovoid head, a short trunk, and a slender tail. At this stage, there is no mouth and as a result, it cannot take anything from outside. Most of the nutrition is provided by the yolk material. The exchange of gases takes place in three pairs of highly vascular and feathery external gills. Continue reading How does a Tadpole change into a Frog?
Enzymes are complex biological molecules which catalyze or greatly speeds up the rate at which a chemical reaction will occur. They are primarily proteins, but some enzymes, called ribozymes, are made of RNA. The key concept behind the speeding up of a chemical reaction by an enzyme is that it reduces the activation energy required for a reaction. In doing so, it speeds up the reaction. Continue reading How Enzymes speed up the chemical reactions?
Nature has created many beautiful masterpieces, but a butterfly is the most beautiful and colorful masterpiece. The vivid colors of butterfly wings are so life like that sometimes people call them “flying flowers”. Do you know, these colorful creatures actually belong to the insect family of the animal kingdom. Here are some amazing facts about butterflies that may surprise you.
The Pituitary Gland is located in a bony cavity called Sella turcica and is attached to the hypothalamus by a hypophyseal or infundibular stalk in front of the pons. It consists of three lobes: Anterior lobe, Intermediate, and Posterior Lobe. These three lobes produce nine different types of pituitary hormones. Continue reading What are various Hormones produced by Pituitary Gland?