How does the lysogenic pathway differ from the lytic pathway? What will be an ideal response?
ANSWER: For the most part the two are similar. But in the lysogenic pathway, the virus incorporates its
genetic material into the host cell genome. This allows the virus to be replicated along with
the host cell without damaging the host cell. In the lytic pathway, viral genes are expressed
immediately, and the host cell produces viral particles quickly, which are released by cell
lysis.
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Secondary endosymbiosis occurs when a
a. photosynthetic eukaryote engulfs a photosynthetic prokaryote. b. photosynthetic eukaryote engulfs a non-photosynthetic prokaryote. c. photosynthetic eukaryote engulfs a non-photosynthetic eukaryote. d. non-photosynthetic eukaryote engulfs a photosynthetic prokaryote. e. non-photosynthetic eukaryote engulfs a photosynthetic eukaryote.
Which of the following phrases is used to describe J. B. Lamarck's hypothesis of evolutionary change?
a. inheritance of ancestral identity b. inheritance of acquired characteristics c. natural selection d. survival of the fittest e. intelligent design
What distinguishes the leatherback sea turtle from other sea turtles pictured in this figure?
1.lacks shell
2.streamlined body
3.paddle-shaped back limbs
4.large flipper-like front limbs
Which is the first eon for which there is evidence of life?
A. Archean eon B. Proterozoic eon C. Stromatolite eon D. Hadean eon E. Phanerozoic eon