Severe physical impacts on a habitat are called ____
Fill in the blank with the appropriate word.
disturbances
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The growth ring of a tree is actually composed of
a. epidermis. b. parenchyma. c. phloem. d. xylem
Working with intentionally mutated cells, you come across a cell that seems to be struggling with transcription of a gene with a distant enhancer. Further examination shows that the enhancer region for this gene is several thousand base pairs away but fully intact. However, for this enhancer to interact with the core promoter, it requires assistance. Given that this assistance has failed, which proteins are likely to be mutated?
a. distal control elements b. RNA polymerase c. DNA bending proteins d. core promoter sequence
The study of the patterns in the distribution of plants and animals around the world is
a. diversity. b. biogeography. c. ecology. d. archaeology. e. environmentalism.
Archaea and bacteria diverged approximately:
A) 3 billion years ago. B) 2 billion years ago. C) 4 billion years ago. E) 10,000 million years ago.