Help:( Match the air mass with its description.

1-Arctic:

2-Maritime Tropical:

3-Maritime polar:

4-Continental:

OPTIONS

1-cold and dry

2-cold and humid

3-extremely cold and dry

4-warm and humid

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

List two modern organisms that have pentameral symmetry

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass