The diagram shows the life cycle of a fern. Which labels belong in the areas marked 1 and 3?

The life cycle of the fern has two different stages; sporophyte, which releases spores, and gametophyte, which releases gametes.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.