What did you include in your response? Check all that apply.
Sample Response: When the muscle on the top of the
arm relaxes and the muscle on the bottom of the arm
contracts, the arm straightens. When the muscle on top
of the arm contracts and the muscle on the bottom of the
bone relaxes, the arm bends. Muscles work in pairs to
create movement.
The contraction and relaxation of muscle pairs
work to move bones.
Bones and muscles work together to allow
movement.
Muscles work in pairs to create movement.
us Activity
ae

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10