The energy for nearly every organism in almost every ecosystem ultimately comes from _____.
Fill in the blank(s) with the appropriate word(s).
Answer: the sun
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The bacterium Deinococcus radiodurans is able to withstand the damage incurred by exposure to very high levels of ? irradiation. This exposure introduces many double-stranded breaks that are repaired within hours
Which of the following is a key component of this rapid repair mechanism? A. RecA B. extended synthesis-dependent strand annealing (ESDSA) C. synthesis-dependent strand annealing (SDSA) D. double-strand break repair (DSBR) E. XerCD
Which gas was most likely not present in the Earth's early atmosphere? a. Methane b. Hydrogen c. None of these choices
d. Oxygen e. Ammonia
What name is given to the alteration of an RNA sequence after transcription?
What will be an ideal response?
Mendel's work involved plants that showed incomplete dominance.
a. true b. false