BIOLOGY

            Huskies are (a)   Dogs (b)  Yak (c)   Thick furred dogs used by Eskimos (d)  ...

Honey mainly consist of monosaccharides Both the chambers contain about 7 rectangular wooden frames called comb frames arranged vertically. The...

    The rearing of animals for specific purposes is called domestication, and such animals are called domestic animals. Domestication...

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Diatoms are                                                                      [BHU 2000] (a)   Fungi                                      (b)   Plantae (c)   Protista                                  (d)   Protozoans Red oceanic tides can be due...

Which group of organisms are devoid of cell wall in their vegetative stage but develop a wall in reproductive phase...

  Characteristics of protista Protista (Protistos = Primary) includes unicellular eukaryotes and show the following characters : (1) Protists include...

Which of the following represents obligate anaerobes [CPMT 1991] (a)   Spirogyra                               (b)   Pisum sativum (c)   Onion                                     (d)   Methane bacteria Which...

In bacteria [AFMC 1982] (a)   DNA is enclosed in nucleus (b)   DNA is scattered (c)   DNA is double stranded and...

  Characteristics of monera Monera (Monos – single) includes prokaryotes and shows the following characters : (1) They are typically...

  Taxonomy Biology is an important branch of science dealing with the study of life. It is difficult to define...

History of man is only about 50,000 years old. In the course of human history there have been three major...

Molecular organisation of chromosome Broadly speaking there are two types of models stating the relative position of DNA and proteins...

    The term genetics (Gk. Genesis – descent) was coined by Bateson (1906). Genetics is the study of principles...

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Cyclic And Non Cyclic Photophosphorylation We all are well aware of the complete process of photosynthesis. Yes, it is the...

Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular...

Guttation is the process of secretion of water droplets from the pores of some vascular plants like grass. Guttation is often confused...

“Transportation is the process that involves the movement of water and necessary nutrients to all parts of the plant for...

Plants are an essential part of the ecosystem. Every life on the earth is directly or indirectly dependent on plants....

What is a Stem? The stem is the ascending part of the axis bearing branches, leaves, flowers and fruits. It develops...

Modifications of Stem The stem helps in providing structure and support to the plant. It is modified into three important...

The root is an underground part of the plant that absorbs water and minerals from the soil and anchors the...

Morphology is the name given to the science that deals with the study of the form and structure of things....

Racemose is a type of an inflorescence where the main axis continues to grow indefinitely and does not terminate in...

Inflorescence The pattern of flower arrangement on the floral axis is known as inflorescence. Inflorescence is divided into two main...

# What do you understand by natural selection? Give examples. Natural selection is an important mechanism of evolution. It states...

The Modern Synthetic Theory of Evolution describes the evolution of life in terms of genetic changes occurring in the population...