The carbon cycle is the movement of carbon atoms via natural processes such as ___
a. deforestation, photosynthesis, fossil fuels
b. deforestation, photosynthesis, respiration
c. decomposition, photosynthesis, fossil fuels
d. decomposition, photosynthesis, respiration
e. decomposition, deforestation, fossil fuels
Answer: d. decomposition, photosynthesis, respiration
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Primary endosymbioses gave rise to ________ and secondary endosymbioses gave rise to ________
A) chloroplasts in algae / chloroplasts in plants B) mitochondria in eukaryotes / chloroplasts in eukaryotes C) chloroplasts and mitochondria in plants and red and green algae / chloroplasts in other eukaryotes D) chloroplasts and mitochondria in green and red algae / chloroplasts and mitochondria in diatoms
The skin of sharks is covered with scales called:
a. placoid. b. cycloid. c. ctenoid. d. ganoid. e. circular.
Which of the following account for 20% of the greenhouse gases recorded annually?
a. deforestation of dry tropical forests b. deforestation of moist tropical forests c. burning of fossil fuels d. burning of coal e. urbanization
Gene therapy is performed by ____
a. replacing the genomes of an individual with a brand new set of genomes with the goal of treating a genetic defect b. replacing a defective gene in an individual with a normal gene with the goal of treating a genetic disorder c. transferring a mutated gene into an individual with the goal of treating a genetic defect d. transferring a normal or a modified gene into an individual with the goal of treating a genetic defect e. replacing a defective enzyme in an individual with a normal enzyme with the goal of treating a genetic disorder