STD 12 - 6. evolution — Biology STD 12 Science — Question

A colourblind girl is rare because she will be born only when:

When single gene regulates many phenotypic characters, such gene is called as:

An inverted pyramid of biomass can be found in which ecosystem?

The mutations which prove fatal for the organism are called:

Which one of the following technique is used for the manipulation of plant species in order to create desired plant types that are better suited for cultivation and give better yields and are disease resistant?

An individual having three dominant alleles and three recessive alleles will have skin colour:

Which one of the following pairs is a sedimentary type of biogeochemical cycle?

During evolution of man, many changes have taken place in his ancestral character. Which one of the following is an unsignificant change?

The chemical nature of chromosome is as follows

In a seed of maize, scutellum is considered as cotyledon because it