1. Annelida
2. Porifera
3. Acanthocephala
4. Echinodermata
Porifera
1. Multicellular with a gastrovascular system
2. Multicellular having tissue organization, but no body cavity
3. Unicellular or a cellular
4. Multicellular without any tissue organization
Multicellular without any tissue organization
1. Amoebocytes
2. Archaeocytes
3. Choanocytes
4. Myocytes
Archaeocytes
1. Exclusively marine animal
2. Exclusively freshwater animal
3. Mostly freshwater animal but few are marine animals
4. Mostly marine animals but few are freshwater animals
Mostly marine animals but few are freshwater animals
1. Radial
2. Bilateral
3. Spherical
4. Biradial
Bilateral
1. Body organization
2. Body plane
3. Skeleton
4. Canal system
Skeleton
1. Methane
2. Chlorofluorocabrons
3. Nitrogen
4. Carbon dioxide
Nitrogen
1. Ozone layer depletion
2. Global warming
3. Acid rain
4. None of these
Ozone layer depletion
1. Coal miners
2. Refinery Workers
3. Petrochemical industry
4. Farmers
Coal miners
1. 70%
2. 100%
3. 50%
4. 30%
70\%