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BIO230 study set 1
diversity
| Question | Answer |
|---|---|
| What organisms represent the major steps in animal evolution? | sponges, jellies/corals, Bilateria |
| Bilateria | (clade) having bilateral symmetry |
| What stage of animal evolution do Sponges represent? | no symmetry, no nerves/muscles |
| What stage of animal evolution do Jellies/Corals represent? | radial symmetry, nerves, no head |
| What stage of animal evolution does Bilateria represent? | muscles, directional movement, head mostly wormy |
| What morphology became prevalent after the Cambrian explosion? | shells, cuticles, and exoskeletons |
| When approximately did the Cambrian explosion occur? | ~500 mya |
| How many species are named? | ~2 million |
| How many are insects? | ~1 million |
| Why are Insects so diverse? | mobilty, tough exoskeletons, small, fecund (many offspring), rigid genitals (sexual isolation) |
| What are the "big 6" orders of insects that comprise 90% of species? | Orthoptera, Hemiptera, Hymenoptera, Coleoptera, Lepidoptera, and Diptera |
| Orthoptera | (order) Grasshoppers, Crickets, Katydids ~24k species |
| Hemiptera | (order) True Bugs ~106k species |
| Hymenoptera | (order) Bees, Wasps, Ants ~117k species |
| Coleoptera | (order) Beetles ~387k species |
| Lepidoptera | (order) Butterflies and Moths ~157k species |
| Diptera | (order) Flies ~115k species |
| What groups became dominant upon the development of seed plants ~300-250 mya? | Orthoptera, Hemiptera, and Coleoptera |
| What groups became dominant upon the development of flowering plants ~144-65 mya? | Diptera, Hymenoptera, Coleoptera, Lepidoptera |
| How many named vertebrates are there? | ~50k |
| How many named vertebrates are fish? | ~25k |
| What are the major evolutions in vertebrates in order? | jaws, bone swim bladder, feet, amniotic egg |
| How many species of plants are there? | ~350k |
| What are the major periods of evolution in plants? | ~550 mya colonization of land, ~350 first forests, ~300-150 Conifers dominate, ~150 Angiosperms dominate |
| What is the name for the type of plant that reproduces with a cone seed? | Conifers |
| What is the name for the type of plant that reproduces by flowering? | Angiosperm |
| What is the most common plant type and the number of species? | Flowering plants ~235k species |
| What portion of biomass do plants comprise? | ~80% 450 Gt C |
Created by:
NickAbell
Popular Ecology sets