The crustacea are the sister group to the hexapoda
a. true
b. false

True

Explanation:

Crustaceans are the group of organism that live in water and on land as well for sometime. The Branchiopoda is the sister group of hexapoda.

The Branchiopoda is a class of Crustaceans which is the sister of hexapoda. There are many investigations going on to know which class of crustaceans is closest to the hexapoda.

But there is no such confirmation but till date the research and investigations suggest that the Crustaceans are group of hexapoda.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.