Ascientist is creating a new synthetic material. the material’s density is 6.1 g/cm3. which sentences describe how the scientist can lower the material’s density?

a. the scientist can decrease the mass while keeping the volume constant.
b. the scientist can increase the mass while keeping the volume constant.
c. the scientist can decrease the volume while keeping the mass constant.
d. the scientist can increase the volume while keeping the mass constant.

Each hereditary trait corresponds to

What is the ecological role of food chains and food webs

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