3 pts When large masses of air come together at a front, as shown in this
illustration, there is usually a weather change.
Cold air mass
Warm air mass
What change is likely to occur at this front?
O rainy weather as water vapor in the cold air mass condenses
o clearing weather as the cold front pushes the clouds to the right
sunny weather as the two air masses reach the same temperature
stormy weather as the water vapor in the warm air mass cools and condenses

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

the scientific method.