The organisms in which male and female reproductive organs are found in the same individual are called bisexual .....

Ovum is a female gamete produced in female sex organ after .....

The transfer of pollen grains from anther to stigma is called .....

The process in which two male gametes fuse with different female nuclei in the embryo sac is called double .....

The process in which a multicellular organism breaks into two or more daughter organisms is called .....

Bees are the pollinators i e. they help in transferring the pollen grains from anther to stigma of the same or different mustard plants. Such process helps in the reproduction which ultimately increases the production of mustard. But when all the .....

This type of reproduction is called vegetative propagation by stem (Asexual reproduction). Such type of reproduction is more beneficial due to the following reasons: 1. A large number of plants can be propagated in as short period of time.  2. .....

Bryophyllum reproduces through leaves i.e vegetative propagation. Planeria reproduces through .....

Asexual reproduction does not involve the fusion of gametes are .....

Isogametes are those gametes which do not differentiate into male and female by structure but work as opposite sex .....

The fertilization which takes place inside the body of female is called internal .....

In case of higher animals, sexes are separated. Both male and females are involved in reproduction. So, the reproduction is sexual reproduction. The male produces sperm cells and female produces the egg cells during male and female gametes fuses to .....

The organisms in which male and female reproductive organs are found in separate individuals are called unisexual .....

The transfer of pollen grains from the anther of one flower to the sigma of another flower is called .....

The process in which a parent body breaks into two or more fragments and each fragment develops into a new individual is called .....

The transfer of pollen grains from anther to stigma within the same flower without any agent is called .....

Sperm is a male gamete produced in male sex organ after .....

Zygote is a fertilized ovum having diploid number of .....

The process in which one parent body divides into more than two daughter organisms under unfavourable condition is called multiple .....

a. The diagram shows the asexual reproduction ie. Sporulation. b. A is sporangium.     B is spore. c. This type of reproduction occurs in Mucor and .....

Stock Scion

1. The plant whose root system is .....

The fertilization which takes place outside the body of female is called external .....

The process in which the vegetative parts of plants such as roots, stem and leaves take part in the formation of new plants is called vegetative .....

The process of fusion of male and female gametes is called .....

The reproduction which takes place by the fusion of male gamete and female gamete is called sexual .....

The reproduction which takes place without the fusion of a male gamete and a female gamete is called asexual .....

The process in which an outgrowth or bud is produced from the parent body is called .....

Turner’s syndrome is chromosomal disorder due to change in number of sex chromosome. Turner’s is caused in the offspring by the fertilization of an abnormal egg and a normal sperm or an abnormal sperm and normal egg. It is caused by the .....

The eggs of females contain “X” chromosome. In male two different types of gametes are produced, they are denoted by “X” and “Y”. During fertilization, if the male gamete of “X” chromosome fuses with .....

Down’s syndrome Each cell of human body contains 23 pairs of chromosomes. The disorder in the human body, which occurs due to one extra copy of chromosome in 21 pair of chromosomes in called Down’s syndrome. It alters the course of .....

On the basis of position of centromere there are four types of chromosomes. They are: i. Metacentric chromosome: The chromosome in which the centromere is present in the centre of the chromosomes making equal arms is called metacentric .....

The diseases which are present in sex chromosomes and which transfer from one generation to another generation are called sex linked diseases. Colour blindness, haemophilia are the examples of sex-linked .....

Gametes are haploid because these are formed from the reproductive cells by meiosis cell divisions. So, gametes contain only one set of chromosome i.e in human gametes contain 23 numbers of .....

It is the rearing of silkworm for the commercial production of silk .....

Polythene Bakelite It becomes soft on heating. It becomes hard on heating. It can be remolded. It cannot be .....

The pure white soil which is used to make ceramics is called .....

Minerals are the naturally occurring substances having characteristics chemical .....

Ores are the naturally occurring substances from which metals can be extracted conveniently and .....

A good fuel is the one which: 1. gives out a lot of heat 2. burns with a clean flame 3. burns steadily 4. easy to .....

Nuclear Fission: The process in which a heavy nucleus (such as uranium, plutonium or thorium) is broken into two nearly equal fragments when bombarded with low-energy neutrons a tremendous amount of energy is released. This process is called nuclear .....

We can minimize environmental pollution caused by burning of fossil fuels by: a. reducing the use and burning of fuels b. using more efficient machines which emit less pollutant c. introducing techniques of treating the pollutant before emitting in .....

The devices run by solar energy are: a. Solar cooker b. Solar calculator c. Solar heater The traditional uses of solar energy are: a. It has been used for drying clothes, obtaining salt from sea water, reducing the moisture content in food grains .....

LPG is considered as an ideal fuel because 1. It is easy to store, handle and transport. 2. It produces large amount of heat on burning. 3. It does not leave any residue on .....

Advantages of charcoal over wood are: 1. It has higher heat generating efficiency. 2. Charcoal does not produce smoke on burning so it is a clean fuel. 3. It is easier to transport and ready to use in a convenient dry and broken-up .....

A substance that produces useful energy when it burn or undergoes a chemical f or nuclear reaction is called fuel. The fuel such as coal, wood, oil, or gas provides energy when burned. A good fuel is the one which produces a huge amount of heat on .....

Nuclear energy is produced by nuclear fission and nuclear fusion reaction. In nuclear fission reaction, when a heavier nucleus is bombarded with slow neutrons, it splits into lighter nuclei with the release of a large amount of energy. This energy .....

The following ways reduce the energy crisis in Nepal: 1. by using and producing more hydroelectricity 2. by using more bio- fuel 3. by using more solar .....

In order to obtain enough energy to generate electricity, geothermal power plants depend on heat that exists a few kilometers below the surface of the Earth. The steam is piped directly to a power plant, where it is used to fuel turbines and .....

E = mc2 was proposed by Albert Einstein. The symbols E, m and c stand for: E – energy m – mass c – velocity of light in .....

Nuclear energy can be considered as an alternative source of energy because nuclear energy is a non-renewable source of energy but very few countries of the world are able to use it, as there is a big deposit of radioactive substances in the world, .....