BIOLOGY 1104 EXAM 2 QUESTIONS
AND ANSWERS
How do we know if something belongs to Kingdom Animalia? - Correct Answers --
Multicellular
-No Cell Walls
-Heterotrophic (eats other living things)
-Specific life cycle (eggs/sperm ar single-celled, multicellular after fertilization)
Four important developments in animal evolution? - Correct Answers -1. True Tissues
2. Body Symmetry
3. Complete digestion
4. Coelom
Tissues - Correct Answers -Layers of specific types of cells that allow that tissue to
carry out a particular function
Three Tissue layers - Correct Answers -Ectoderm - skin, nervous system
Endoderm - digestive system
Mesoderm - muscles, bone
Why are tissues an important evolutionary development? That is, how does having
tissues make animals better adapted? - Correct Answers -Allows for differentiation and
specialized functions, allows coordination among cells
What is one thing that all fishes have? - Correct Answers -Gills
Tetrapods - Correct Answers -Four limbed vertebrates
What is the benefit of a 2 chambered heart? - Correct Answers -Increases blood flow
Where did the first land-dwelling tetrapods evolve from? - Correct Answers -Lobe finned
fish
Coelom - Correct Answers -Hollow, fluid filled internal cavity that acts as a protective
cushion for internal organs
Why is a coelom an important evolutionary development? - Correct Answers -Protects
internal organs, allows for better movement/flexibility, allows for development of organs
, Sponges - Correct Answers -Porifera, all contain internal system of pores and canals
Sponges are the only phylum of animals with what? - Correct Answers -Totipotent cells.
Any cell gan give rise to any other type of cell
Protostome - Correct Answers -"mouth first", mouth is the first hole to develop as an
embryo
Deuterstomes - Correct Answers -"Mouth second", anus is the first hole to develop
Why is a complete digestive system an important development? - Correct Answers -
More efficient digestion
What kind of reproduction to sponges participate in? - Correct Answers -Sexual or
Asexual
Hermaphroditic
-Sexual reproduction produces mobile larva
What is in the phylum Cnidaria? - Correct Answers -Jellyfish, Corals, Anemones, Hydra
Traits of Cnidaria - Correct Answers --True tissues (2 layers)
-Radial Symmetry
-No coelom
-Neither protostome or dueterostome (incomplete digestive system)
What are the two tissue layers of Cnidarians? - Correct Answers -Ectoderm and
Mesoglea
Mesoglea - Correct Answers -Functions as skeleton, gives structure to animal
Medusa - Correct Answers -Moving type of Jellyfish
Polyp - Correct Answers -Cylindrical and sessile, upward facing mouth
Why might a polyp form cnidarian be beneficial for a sessile (non-moving_ animals to
live in large colonies? - Correct Answers -1. Reproduction
2. Defense
Four Groups within Arthropods - Correct Answers -Chelicerata, myriapods, crustacea,
Hexapoda
Myriapods - Correct Answers -Arthropoda : Group involving spiders and millipedes
Hexapoda - Correct Answers -Arthropoda: Fleas, crickets, ants, butterfly
AND ANSWERS
How do we know if something belongs to Kingdom Animalia? - Correct Answers --
Multicellular
-No Cell Walls
-Heterotrophic (eats other living things)
-Specific life cycle (eggs/sperm ar single-celled, multicellular after fertilization)
Four important developments in animal evolution? - Correct Answers -1. True Tissues
2. Body Symmetry
3. Complete digestion
4. Coelom
Tissues - Correct Answers -Layers of specific types of cells that allow that tissue to
carry out a particular function
Three Tissue layers - Correct Answers -Ectoderm - skin, nervous system
Endoderm - digestive system
Mesoderm - muscles, bone
Why are tissues an important evolutionary development? That is, how does having
tissues make animals better adapted? - Correct Answers -Allows for differentiation and
specialized functions, allows coordination among cells
What is one thing that all fishes have? - Correct Answers -Gills
Tetrapods - Correct Answers -Four limbed vertebrates
What is the benefit of a 2 chambered heart? - Correct Answers -Increases blood flow
Where did the first land-dwelling tetrapods evolve from? - Correct Answers -Lobe finned
fish
Coelom - Correct Answers -Hollow, fluid filled internal cavity that acts as a protective
cushion for internal organs
Why is a coelom an important evolutionary development? - Correct Answers -Protects
internal organs, allows for better movement/flexibility, allows for development of organs
, Sponges - Correct Answers -Porifera, all contain internal system of pores and canals
Sponges are the only phylum of animals with what? - Correct Answers -Totipotent cells.
Any cell gan give rise to any other type of cell
Protostome - Correct Answers -"mouth first", mouth is the first hole to develop as an
embryo
Deuterstomes - Correct Answers -"Mouth second", anus is the first hole to develop
Why is a complete digestive system an important development? - Correct Answers -
More efficient digestion
What kind of reproduction to sponges participate in? - Correct Answers -Sexual or
Asexual
Hermaphroditic
-Sexual reproduction produces mobile larva
What is in the phylum Cnidaria? - Correct Answers -Jellyfish, Corals, Anemones, Hydra
Traits of Cnidaria - Correct Answers --True tissues (2 layers)
-Radial Symmetry
-No coelom
-Neither protostome or dueterostome (incomplete digestive system)
What are the two tissue layers of Cnidarians? - Correct Answers -Ectoderm and
Mesoglea
Mesoglea - Correct Answers -Functions as skeleton, gives structure to animal
Medusa - Correct Answers -Moving type of Jellyfish
Polyp - Correct Answers -Cylindrical and sessile, upward facing mouth
Why might a polyp form cnidarian be beneficial for a sessile (non-moving_ animals to
live in large colonies? - Correct Answers -1. Reproduction
2. Defense
Four Groups within Arthropods - Correct Answers -Chelicerata, myriapods, crustacea,
Hexapoda
Myriapods - Correct Answers -Arthropoda : Group involving spiders and millipedes
Hexapoda - Correct Answers -Arthropoda: Fleas, crickets, ants, butterfly
