Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Which one of the following is not an abiotic component?

Hybrid breakdown refers to the condition when offsprings are physiologically inferior to which of the following generations?

Being all mammals, whale, dolphin, bat, monkey and horse have some common trait, but they also show conspicuous differences. This is due to the phenomenon of:

Which is wrongly matched ___________________:

Given below is a pedigree chart showing the inheritance of a certain sex- linked trait in humans.

The trait traced in the above pedigree chart is

Stellar distances are measured:

The starter of inoculum is added to the fresh milk in order to convert milk into curd, the term starter or inoculum here refer to

In the evolution from Homo erectus to Homo sapiens one of the following has played a significant role

The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos without fertilisation is called:

Cancer is related to