Molecular basis of Inheritance — BIOLOGY STD 12 Science — Question

Alexander von Humboldt described for the first time

A population has more young individuals compared to the older individuals. What would be the status of the population after some years?

The main reason for the success of Mendel was that:

Edward Jenner discovered-

Assume that blue flowered plant is dominant character over the white. When a blue flowered plant is crossed with its white flowered plant, the progeny showed 50% of plants with blue flowers is with white flowers. The genotypes of blue and white parents respectively are:

What is the figure given below showing in particular ?

At what stage of endosperm development, you will observe nuclear or cellular type of endosperm

Which of the following representations shows the pyramid of numbers in a forest ecosystem ?

Generative cell was destroyed by laser but a normal pollen tube was still formed because:

In a type of apomixis known as adventive embryony, embryos develop directly from the.