Which substance is cycled between organic matter and abiotic reservoirs?
A) fat
B) carbon
C) protein
D) nucleic acid
Answer: B
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The cell wall
a. provides physical support for plant cells. b. controls the transport of materials out of the cell. c. replaces the plasma membrane in plant cells. d. is found in all eukaryotes. e. prevents the transport of toxic substances into the plant cells
Which of the following is NOT true concerning
Pangaea? a. It formed during the Permian. b. Gymnosperms flourished on Pangaea c. It caused climates to become warmer and wetter. d. It began to break apart during the Jurassic. e. Plant diversity expanded on its isolated fragments during and after the Jurassic.
Nondisjunction of the XY pair during the first meiotic division can produce sperm with 2 X chromosomes and 2 Y
chromosomes. _________________ Indicate whether the statement is true or false.
Every year certain parts of California have fires that sweep rapidly through the area, burning or endangering homes. What type of biome is found there, and why does it burn so frequently?
What will be an ideal response?