Which term defines a relationship with a negative effect on both the actor and recipient?
A. Selfish
B. Mutualistic
C. Spiteful
D. Altruistic
Ans: C. Spiteful
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Most of the enzymes that catalyze biochemical reactions involving amino acids recognize the L stereoisomer
Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1. Plants appear green to the human eye because the pigment chlorophyll a absorbs the visible light wavelengths from either end of the visible spectrum, such as red and violet. 2. Calvin cycle reactions are an essential process by which plants produce lipids. 3. Plasmids are small loops of genetic material that are essential for a prokaryotic cell’s normal growth. 4. When a cell replicates and divides, most of the phases of mitosis involve reproduction of the cell’s genetic material. 5. This statement is true. When a cell replicates and divides, most of the phases of mitosis involve reproduction of the cell’s genetic material.
Materials in sedimentary cycles
a. pass through both a solid and a gaseous phase. b. are never present as gases in the ecosystem. c. are present as liquids in the earth but as gases in the atmosphere. d. pass through both a solid and a gaseous phase and are present as liquids in the earth but as gases in the atmosphere. e. exist only in solid rocks.
When did the major evolutionary expansion of terrestrial plants and animals occur?
A. Mesozoic era B. Paleozoic era C. 2 million years ago D. Cenozoic era