Oceans represent the largest natural source of sulfur gases released to the atmosphere
Indicate whether the statement is true or false
TRUE
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Which of the following is a key objective of gene therapy?
a. curing heritable diseases b. multiplying stem cells c. developing new antibiotics d. improving plant hardiness
The theory that chloroplasts and mitochondria had their evolutionary beginnings in eukaryotic cells as endosymbionts is supported by all of the following EXCEPT:
a. chloroplasts and mitochondria are completely autonomous within eukaryotic cells. b. chloroplasts and mitochondria have DNA. c. chloroplasts and mitochondria have small ribosomes for protein synthesis. d. chloroplasts and mitochondria are approximately the same size as prokaryotic cells. e. chloroplasts and mitochondria have the same shape as prokaryotic cells.
Species richness is a measure of both the number of species and the relative importance of each
species based on its abundance, productivity, or size. ____________________ Indicate whether the statement is true or false.
What are carcinogens?
A) Physical or chemical factors that can lead to mutations causing cancer B) All mutagens C) Errors during DNA replication D) Chemical factors that can treat cancer