The amount of energy stored in plant tissue is an ecosystem's
a. gross primary productivity.
b. net primary productivity.
c. biomass ratio.
d. greenhouse cofactor.
e. production limit.
B
You might also like to view...
Which of the following statements about DNA and RNA are true, and which are false?
a. DNA is a double-stranded molecule, and RNA is single-stranded. b. The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA. c. A hydrogen atom is present on the 3 carbon the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides. d. The DNA and RNA molecules in a cell are copied by replication before a cell divides. e. RNA is the primary long-term storage molecule for genetic information in eukaryotic cells. f. Hydrogen bonds and phosphodiester bonds maintain the structure of DNA molecules, whereas only phosphodiester bonds are important for the structure of RNA molecules.
Which of the following drugs is NOT an alkaloid?
A. morphine B. caffeine C. LSD D. nicotine E. heroin
Referring to the above diagram of the brain, D
identifies which region?
a. hypothalamus b. pons c. cerebrum d. cerebellum e. thalamus
In the broadest definition, cells can communicate with other tissue types via _____
Fill in the blank(s) with the appropriate word(s).