As the products of photosynthesis are used as the reactants during respiration, these two processes are said to be:
A. antagonistic.
B. complementary.
C. supplementary.
D. symbiotic.
E. tangential.
B
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How do modified and unmodified histone subunits become distributed among nucleosomes after replication?
A. The newly synthesized DNA strand contains unmodified histone subunits, while the old strand retains the modified histones. B. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A histones, followed by mixtures of H2B, H3, and, finally, H4. C. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A and H2B histones, followed by mixtures of H3 and finally mixtures of H4. D. Both strands of DNA retain H3-H4 modified pairs, and then are repopulated with unmodified H3-H4 pairs, followed by modified and unmodified H2A-H2B. E. Both strands of DNA retain H2A-H2B modified pairs, and are then repopulated with unmodified H2A-H2B pairs and then mixtures of modified and unmodified H3-H4 pairs.
Which of the following best defines sympatric speciation?
a. speciation that occurs in the same location b. speciation that results from allele mutation c. speciation that occurs in analogous structures d. speciation that results from a geographic separation
What are hormones?
A. They are chemicals transported in the blood that affect target cells throughout the body. B. They are chemicals transported in the blood that affect all cells similarly. C. They are chemicals that affect cells right next to where they are produced. D. They are carbohydrates on the surface of red blood cells that affect targeted cells throughout the body.
TRAIT SPECIESABCDE101111200111310101401111500001610101 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which pair of species shares the greatest number of derived characters (synapomorphies)?
A. 6 and 3 B. 6 and 1 C. 5 and 6 D. 1 and 4 E. 5 and 1