b) A gift of nature which is very useful to mankind Explanation A commodity is generally considered a natural resource... View Article
b) Forest Water, Wind and Sunlight are the natural resources which can’t be exhausted but since forests are being cut... View Article
c) Electricity Explanation Soil, water and air are natural resources whereas electricity is produced by humans by transformation of different... View Article
The law of independent assortment states that: When two pairs of traits are combined in a hybrid, one pair of... View Article
The basic features of inheritance are (i) Characters are controlled by genes. (ii) Each gene controls one character. (iii) There... View Article
Morphological structures are nothing but the structure which are apparent to our eyes.They are those biomolecules which are the integral components... View Article
Acquired characters do not produce change in the DNA of germ cells, so they cannot be inherited. Only those characters... View Article
An acquired trait is the character developed in an individual as a result of environmental influence. Inherited traits that are inherited... View Article
All human beings have emerged from a common ancestor as they have the maximum number of common characters. All humans are a... View Article
It depends on the way we evaluate evolution. If the complexity of the body is a parameter then Human are... View Article
Yes, geographical isolation of individuals of a species does lead to formation of new species. Example: Building of dams in... View Article
Women have two X chromosomes and men have one X and one Y chromosome. Hence a female produces gametes which... View Article
(a) Yellow – Dominant, Green – Recessive (b) Round – Dominant, Wrinkled – Recessive Explanation Dominant traits are always expressed when the... View Article
Inspite of the fact that animals have different variety of structures they don not have common ancestry. This is because... View Article
Homologous structures are comparable in two organisms which have the same ancestors, but the functions displayed may or may not... View Article
A very small population of a species faces a greater threat of extinction than a larger population. Smaller population faces more... View Article
The sex of an infant is determined by the type of sex chromosome contributed by the male gamete. The ratio... View Article
Human females have two X chromosomes called sex chromosomes. During meiosis at the time of gamete formation, one X chromosome... View Article
Fossils are the remains or traces of ancient life that have been preserved by natural processes. Examples of fossil include... View Article
No. Sex of a newborn will be determined by the chromosome donated by the father. The sex of an individual... View Article
