What effect did the Late Carboniferous/Early Permian climatic changes have on global vegetation, and how did this affect vertebrate evolution?
What will be an ideal response?
Cooling and drying caused the collapse of the rain-forest ecosystems. This left a world less suitable for large non-amniote tetrapods and promoted the diversification and radiation of amniotes.
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Which of the following is true about the cerebral cortex?
A) It is a deep layer of gray matter. B) It is a superficial layer of gray matter. C) It is a deep layer of white matter. D) It is a superficial layer of white matter. E) It is a deep layer of both white and gray matter.
Urine is prevented from flowing back into the ureters from the bladder by ________________
A. compression of the ureteral openings B. the external urethral sphincter C. the internal urethral sphincter D. the ureteral sphincters E. ureteral valves
It is best to add water to the tank when capturing a fish
Indicate whether the statement is true or false
Identify the ureters in the following figure
A) A B) B C) C D) D E) E