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Earthworm page 1 &2
Stack #92018
| Question | Answer |
|---|---|
| Why are earthworms often called "Nature's Plowman" | they live in the ground and tunnel their way through the ground mixing up the different layers of soil |
| What do earthworms eat (3 things) | decayed leaves, decayed plants, soil, little bits of animal material |
| Name the 2 sets of muscles | circular and long or longitudinal |
| When circular muscles contract the earth worm gets | longer and thinner |
| when the longitudinal muscles contract the ew gets | get shorter and fatter |
| Name 3 ways earthworms help the soil | 1. they mix up different soil layers. 2. they add nutrients to the soil from their waste. 3. they help decompose dead plants and animals that are used by other organisms. |
| What are castings | waste |
| real name of earthworm | lumbricus terrestris |
| T or F the earthworm is an invertebrate | true |
| The # of segments in an adult earthworm is between | 120 & 175 |
| T or F all segments except first and last are similar | t |
| The first segment contains the | mouth |
| the most posterior (last) segment contains the | anus |
| The glandular segments between segments 31 and 37 which must be present in order for reproduction occurs and where the cocoon material is secreted. | clitellum |
| The clitellum is located toward the_________ end | front |
| T or F Earthworms with a clitellum are considered adults and they can mate | true |
| Do earthworms lay eggs | yes |
| Can earthworms regenerate | yes, depending on the segment cut off |
| Why do earthworms need to stay moist | that's how they breathe, through their damp skin straight into their blood vessels |
| How do earthworms get rid of CO2 | through their skin |
| What happens is an earthworms dries out | ugh....death |
| Bristles underneath the ew are called | setae or chaetae |
| do the first and last segment have setae | no, all others do |
| t or f There are 4 sets of setae on each segment | t |
| The setae bristles are made of | chitin |
| Chitin is also on the hard outer shell of | insects |
| Why do ew need setae (2 reasons) | it helps them dig into the soil and helps them cling to the sides of a burrow when predators are trying to get them |
| Name 5 predators (enemies) of the earthworm | birds, frogs, centipedes, moles, man |
| Why is the ew browhish in color | helps protect from predators by making them hard to see against the soil (protective adaptation) |
Created by:
CherylMess
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