Several characteristics distinguish rays and skates. Skates generally have tail

Question

Several characteristics distinguish rays and skates. Skates generally have tail spines and produce sinusoidal pectoral fin undulations. lack tail spines and produce sinusoidal pectoral fin undulations. have tail spines and produce more flap-like pectoral fin motions. lack tail spines and produce more flap-like pectoral fin motions. When compared to red muscle, white muscle in fishes has more mitochondria. has less myoglobin. contracts slowly. operates aerobically. is better for sustained cruising.

Explanation / Answer

41 answer is b:- The undualtory pectoral fin motion diagnostic to this taxon is known as rajiform locomotion

42:- answer is b:- because red muscle colour is red due to presence large amount of myoglobin.

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