Fire is an example of __________
a. a disturbance
b. an opportunistic activity
c. a life zone
d. both a disturbance and opportunistic activity
A
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Viroids are characterized by all of the following except
A) circular DNA. B) well-characterized transmission. C) self-replicating. D) latent forms exist in some genomes. E) associated with plant diseases.
Tanisha was just diagnosed with an aggressive form of breast cancer called HER2. The cancer started because
A) she has a deletion in the BRCA1 gene that is found in African-American and Ashkenazi Jewish women. B) her affected breast cells have many extra receptors for epidermal growth factor, and so they receive too many signals to divide. C) her affected cells have extra genes for epidermal growth factor, sending signals for the cells to divide too frequently. D) a translocation occurred between chromosomes 7 and 8, generating and activating a breast-specific oncogene.
A coral reef is a complex _____ of calcium carbonate shells that are home to microbes, algae, invertebrates, and fishes.
A. ecosystem B. community C. biome D. population E. niche
Why are acceptor molecules said to be reduced when they are gaining electrons?
What will be an ideal response?