The general theory of evolution is that organisms have changed over time. Usually, natural selection keeps things the way they are. This is stabilizing selection (Figure 17.9a and b, and Figure 17.10). Agouti rabbits are the best adapted rabbits to survive predation, so the agouti allele remains the most common …

What is Micro-propagation? Micropropagation is a method to produce genetically identical plantlets by using in vitro tissue culture techniques. More specifically, Micropropagation refers to the in vitro multiplication and/or regeneration of plant material under aseptic and controlled environmental conditions to produce thousands or millions of plants for transfer to the …

Metabolism: (Gr. metabole = change) the totality of the chemical changes in living cells which involves the buildup and breakdown of chemical compounds. Metabolites Primary metabolites: Molecules that are essential for growth and development of an organism. Secondary metabolites: Molecules that are not essential for growth and development of an …

General Characteristics The simpliest of all soluble carbohydrate and are known as simple sugar. The building unit of complex carbohydrate Can’t be hydrolised Sweet testing, soluble in water, crystaline Posses a free aldehydee or ketone group General formula CnH2nOn Get Free Netflix Now Best safe and secure cloud storage with …

Heterospory The phenomenon of the development of two types of spores (differing in size, structure and function) by the same species is known as heterospory. The two different sizes are smaller spores also known as microspores and the larger spores  also known as megaspores. Rashid (1999) listed nine genera as …

“SUPERBUGS!”-what is superbugs? I know that superbugs are a new term for the peoples but you know its gonna be a serious matter for us.So,Superbugs are actually the germs that have become resistant to the drugs that should destroy them.But you know one thing!….. These drug resistant bacteria  and fungi are …

বিবর্তন। কথাটা শুনলেই চোখের সামনে ভেসে ওঠে একটা লোমশ বানর সে হাঁটতে-হাঁটতে বড় বড় দাড়ি চুল ওয়ালা মানুষের পরিণত হলো। কি? তাইনা??? আসলে এটাই কি বিবর্তন???স্যার চার্লস ডারউইন কি এই বিবর্তন এ কথা বলেছিলেন?? মোটেই তেমনটা নয়, আমরা একটা ভুল ধারণার মধ্যে বাস করছি। সে যাই হোক, আজকে আমরা একটু …

The simplest members of the order Marchiantales are found in the family Ricciaceae. There are roughly 140 species in the family. They fall under the Tesselina, Ricciocarpus, and Riccia genera. There are only one species each for the first two. The genus Riccia encompasses the remainder. The Italian botanist F. …

Fungi are considered to be one of the most interesting sets of organisms. Some fulfills the basic necessities such as food, medicine, industrial raw materials and some succumbs the living entities to death.According to legend, three and a half millennia ago, the Greek hero Perseus accidentally assassinated his grandfather Acrisius, …

What is Terrarium? Have you ever heard of miniature but thoroughly natural garden, implanted inside a glass jar? Well, that is exactly what terrarium is- it may also be termed as a little rainforest domiciled in an enclosed jar or container made of glass. The word “Terrarium” was derived from …