STD 12 - 7. human health and disease — BIOLOGY STD 12 Science — Question

Cancer cells are more easily damaged by radiation than normal cells because they

How many sentences are correct?

- To produce seeds without fertilisation is called apomixis

- Occurance of more than one embryo in a seed is referred to as polyembryony

- The pollen grains represent the male gametophytes.

In a population frequency of M allele is 0.8. Calculate the homologous recessive allele in that population.

Kaziranga wildlife sanctuary is located in:

In general, in the developmental history of a mammalian heart, it is observed that it passes through a two-chambered fish-like heart, three-chambered frog-like heart and finally to four-chambered stage. To which hypothesis can this above cited statement be hypothesis can this above cited statement be approximated?

Constant grazing and browsing in an area may ultimately result in the formation of

The first link in any food chain is always a green plant because

Chasmogamy refers to the condition where

Industrial melanism is an example of