Which set of fins is used for moving fast?
A) Anal and dorsal
B) Caudal and dorsal
C) Caudal and pectoral
D) Pectoral and anal
E) Anal and pelvic
C
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Why are raindrops less than 2 mm nearly spherical in shape but larger raindrops have slightly flatter bottoms?
What will be an ideal response?
The adaptive radiation of mammals began following the Mesozoic extinctions Indicate whether the statement is true or false
Which of the following is characterized by the longest wavelengths?
A) X-rays B) gamma rays C) visible D) thermal infrared E) radio waves
Which of the following statements about the physical environment of the deep-ocean is incorrect?
A) Below 1500 meters, light is present but in low concentrations. B) Oxygen content at the deep-ocean floor is constant and relatively high. C) The physical environment is comparable to that at the surface. D) The physical environment is quite unstable and high variable. E) The temperature rarely exceeds 0°C at the deep-ocean floor.