Fish with muscular fins attached to the body by a fleshy shaft and a series of articulating bones are ____
a. Tiktaalik roseae
b. bony fish
c. ray-finned fish
d. lobe-finned fish
e. sharks
d
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Which is the most abundant chemical sedimentary rock?
A) Chert B) Dolomite C) Rock Gypsum D) Limestone
Oxygen was one of the main gases in the early atmosphere
Indicate whether this statement is true or false.
A few individuals of a bird species fly to a small city that previously had no individuals of this species. The immigrant birds find that the city has adequate food and no predators. On average, each bird has four offspring per year and lives for two years. How will the population of birds change over the first few years?
a. The population will grow steadily, gaining a constant number of birds each year. b. The population will grow more and more rapidly with each passing year. c. The population will grow steadily for a few years and then shrink steadily back to zero. d. The population's growth in the first few years will depend on the size of the city.
Seismographs are records of vibrations caused by the shock waves, where a larger amplitude of vibration is associated with a stronger earthquake.
a. true b. false