AnswersLife Science Q1Dichotomous Keys

Dichotomous Keys Answers

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1
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Why would a scientist want to identify this species of spider? Check all that apply.

A
to be certain that it is a spider
B
to compare it to similar spiders
C
to determine the relationship it has with other organisms
D
to determine if the spider is safe to handle or not
E
to find out how many offspring it has had this year
2
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Which observations would be most helpful in identifying this fish? Check all that apply.

A
It lives in water.
B
It has a long, narrow body.
C
It is covered in spots.
D
It swims to move about its environment.
E
The fin on its back is very close to the tail.
3

roughskin newtlong-toed salamander✔ tiger salamander

A
roughskin newt
B
long-toed salamander
C
✔ tiger salamander
4

starflowerchickweedbowman's root✔ common strawberry

A
starflower
B
chickweed
C
bowman's root
D
✔ common strawberry
5

snailworm✔ centipedespider

A
snail
B
worm
C
✔ centipede
D
spider
6

Use the dichotomous key to identify the organisms that left these tracks.

Answers:
Track A belongs to a .:beaver
Track B belongs to a .:deer
7

Use the dichotomous key to identify the organisms that left these tracks.

Answers:
Track A belongs to a .:beaver
Track B belongs to a .:deer
8

coyote✔ deerbeaverduck

A
coyote
B
✔ deer
C
beaver
D
duck

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