The rod and cone cells are located within which layer of the eye?

A. retina
B. choroid
C. lens
D. iris
E. sclera


Answer: A

Biology & Microbiology

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During prophase I of meiosis, a physical exchange of parts of homologous chromosomes can occur and is called a ____

Fill in the blank with the appropriate word.

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The Lake Erie ecosystem was affected by humans because human activities

a. extracted resources without replacement. b. caused global warming. c. used the water without replacement. d. disrupted energy flow and the cycling of nutrients. e. extracted energy without replacement.

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Vascular plants and air-breathing animals first appeared during which time period?

a. Silurian period b. Permian period c. Cambrian period d. Ordovician period e. Cretaceous period

Biology & Microbiology

A camouflaged animal uses aposematic coloring to hide from predators.

Answer the following statement true (T) or false (F)

Biology & Microbiology