The genus Ichthyostega is the earliest known amphibian. Indicate whether the statement is true or false


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Environmental & Atmospheric Sciences

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The sail-like fin of the pelycosaur may have served as all of the following except

a. sexual display. d. a means to look more ferocious. b. a means of locomotion. e. a thermoregulatory device. c. a means of protection.

Environmental & Atmospheric Sciences

What methods do scientists use to reconstruct both long-term and shorter term climate histories?

What will be an ideal response?

Environmental & Atmospheric Sciences

Which of the below locations within the coastal zone is hardly, if ever, reached by waves?

Environmental & Atmospheric Sciences

The ammonium ion has the formula NH4+. How many nonbonding electrons must be shown in the Lewis structure of the ammonium ion?

A) 0 B) 4 C) 8 D) 9

Environmental & Atmospheric Sciences