class hydrozoa (part of phylum cnidaria)

Question 1

what animals are in this class

Answer 1

hydra and Portuguese man-of-war

Question 2

what stage is dominant? medusa or polyp

Answer 2

polyp stage is dominant

Question 3

describe the medusa stage

Answer 3

short, for reproduction

Question 4

describe the polyps

Answer 4

solitary, small,

Question 5

describe the two stages of a hydra

Answer 5

only the polyp stage is present

Question 6

how do these live

Answer 6

most live in colonies

Question 7

what is the benefit of living in a colony

Answer 7

specialized polyps preform certain functions that benefit the whole group

Question 8

describe the Portuguese man of war

Answer 8

a colony of polyps, with the original polyp becoming a gas-filled float. other attached polyps specialize for feeding or reproduction

Question 9

how do horozoans reproduce

Answer 9

asexually by budding
in unfavorable conditions they may reproduce sexually by producing a resistant zygote that remains dormant until conditions improve