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Biology 1104 Exam 2 Verified Study Solutions With Real Study Quiz
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Biology 1104 Exam 2 Verified Study Solutions With Real Study Quiz
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Biology 1104 Exam 2 Verified Study Solutions WithReal Study Quiz
How do we know if something belongs to Kingdom Animalia? ANS -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? ANS 1. True Tissues
2. Body Symmetry
3. Complete digestion
4. Coelom
Tissues ANS Layers of specific types of cells that allow that tissue to carry out a particular function
Three Tissue layers ANS 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? ANS Allows for differentiation and specialized functions, allows coordination among cells
Coelom ANS Hollow, fluid filled internal cavity that acts as a protective cushion for internal organs
Why is a coelom an important evolutionary development? ANS Protects internal organs, allows for better
movement/flexibility, allows for development of organs
Sponges ANS Porifera, all contain internal system of pores and canals
Sponges are the only phylum of animals with what? ANS Totipotent cells. Any cell gan give rise to any other
type of cell
, Protostome ANS "mouth first", mouth is the first hole to develop as an embryo
Deuterstomes ANS "Mouth second", anus is the first hole to develop
Why is a complete digestive system an important development? ANS More efficient digestion
What kind of reproduction to sponges participate in? ANS Sexual or Asexual
Hermaphroditic
-Sexual reproduction produces mobile larva
What is in the phylum Cnidaria? ANS Jellyfish, Corals, Anemones, Hydra
Traits of Cnidaria ANS -True tissues (2 layers)
-Radial Symmetry
-No coelom
-Neither protostome or dueterostome (incomplete digestive system)
What are the two tissue layers of Cnidarians? ANS Ectoderm and Mesoglea
Mesoglea ANS Functions as skeleton, gives structure to animal
Medusa ANS Moving type of Jellyfish
Polyp ANS 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?
ANS 1. Reproduction
2. Defense
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