Which of the following statements is true regarding the theory of continental drift?
A. Alfred Wallace believed that the distribution of seed fern fossils supported continental drift.
B. Alfred Wegener believed that the continents formed a supercontinent called Pangea.
C. Charles Lyell believed that the continents split into two smaller continents called Gondwana and Laurasia.
D. Charles Darwin believed that the continents formed a supercontinent called Pangea.
Answer: B
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Integrase
A. is required for prophage formation. B. cuts viral genomes. C. is required for genome entry into the bacteria. D. is required for provirus formation. E. cuts the viral genome and is required for both prophage and provirus formation
A robin makes its nest in a maple tree each spring, which helps to protect the eggs from predators, but neither harms nor helps the tree. Which of the following best describes this relationship?
a. Mutualism b. Commensalism c. Parasitism d. Symbiosis
Four of the five answers below were organic compounds included in the Miller and Urey experiment designed to study the early synthesis of organic compounds. Select the exception
a. hydrogen. b. methane. c. oxygen. d. ammonia. e. water.
Researchers have found that schizophrenia may be caused by multiple genes, each contributing equally to the
behavioral phenotype. This is an example of _____. a. a polygenic additive model b. epistasis c. single gene, dominant trait d. single gene, recessive trait e. genome wide association