Pollination
Transfer of pollen grains to the stigma is called pollination. If the pollen grains are transferred to the stigma of the same flower, the pollination is called self-pollination or autogamy . If the pollen grains are transferred to the stigma of another flower of the same species, the pollination ..
Transfer of pollen grains to the stigma is called pollination. If the pollen grains are transferred to the stigma of the same flower, the pollination is called self-pollination or autogamy . If the pollen grains are transferred to the stigma of another flower of the same species, the pollination ..Summary
(the collection of genes) will be inherited by successive generations. Darwin proposed the theory of natural selection. According to this theory, the reproduction in large numbers resulted in a struggle for existence and competition. This leads to survival of the fittest. Thus the best of..
a) Apis Indica
c) Among coelenterates, the sea fur (Obelia) has three types of individuals referred as zooids - polyp, medusa and blastostyles. d) A colonial coelenterate Physalia (Portuguese-man of war) has hundreds of zooids which show polymorphism like: a) dactylozooids for defence b) gastrozooids fo..
Phylum Coelenterata
. These individuals are called Zooids. Reproduction asexually (external budding) or sexually (formation of gametes). fig. 10.7 - Examples of Coelenterata The phylum is divided into three classes Characteristics Class Hydrozoa Class Schyphozoa Class Anthozoa Habitat Fresh water or marine M..
. These individuals are called Zooids. Reproduction asexually (external budding) or sexually (formation of gametes). fig. 10.7 - Examples of Coelenterata The phylum is divided into three classes Characteristics Class Hydrozoa Class Schyphozoa Class Anthozoa Habitat Fresh water or marine M..Speciation
The changes we have discussed so far concern themselves with variations within a species, but how do new species evolve? For instance how did man develop from apes? Speciation is the evolutionary process by which new biological species arise. A new species will be a group of individuals ..
Summary
> is a constant whose value is 1.1 x 10 - 1 5 m. This shows that that heavier nuclei are bigger in size. Density of nuclear matter This value is constant for all nuclei. Binding energy of a nucleus is the energy with which nucleons are bound in the nucleus. It is measured by the work required to be..
> is a constant whose value is 1.1 x 10 - 1 5 m. This shows that that heavier nuclei are bigger in size. Density of nuclear matter This value is constant for all nuclei. Binding energy of a nucleus is the energy with which nucleons are bound in the nucleus. It is measured by the work required to be..See what our Users say :
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