A biologist is using a dichotomous key to identify fish. 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 take to identify a fish that has a single dorsal fin and no fin on the back near the tail? step 5 step 2 step 7 step 6 Mark this and return

step 7

Explanation:

it was on quizlet

Step 7

Explanation:

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.