Exam One BIO108

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1

Characteristics of Life

1. Organization (cells-organism)
2. Take materials and energy (heterotroph/autotroph)
3. Reproduce
4. Respond to stimuli
5. Homeostatic
6. Grow and develop (fertilization-death)
7. Adaptation

2

Classification of Life

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Domain is the most inclusive- Species is the most exclusive

3

Formal naming

Homeo sapiens (italics)
Genus species

4

Organization of Biosphere

1. Biosphere- inhabitable portion of earth; land sea, air
2. Population- all members of particular species in area
3. Community- all different populations in same area interacting
4. Ecosystem- organisms interact among themselves within the physical environment

5

Characterization of Ecosystems

chemical cycling, energy flow
begins when a photo synthesizer becomes food for an animal

6

Food Chain

who eats who in the ecosystem
energy dissipates but nutrients do not

7

Human affects on ecosystems

altered ecosystems or put stress on them
coral reefs and or tropical rainforests
heath of biosphere is essential to future of humanity

8

Process of Science

1. Observations
2. Hypothesis
3. Results
4. Analyze
5. Conclusions

9

Evolutionary Trends Among Animals

1. motile
2. mulicellular heterotrophs
3. ingest food
4. diploid life cycle

10

Invertebrates

1. Sponges
2. Cnidarians

11

Phylum Porifera

many pores
asymetrical
no tissues
aquatic-marine
acoelomate
hermaphrodites (sperm carried by water)
EX: SPONGES

12

Phylum Cnidaria

radial symetry
stinging cells- tentacles
have tissues (endoderm, ectoderm)
exist as POLYPS (tentacles point up, sessile)and/or MEDUSAE (free floating, tentacles point down)
incomplete digestive system

13

Phylum Ctenophora

minor phylum related to cnidaria