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

Biology & Microbiology

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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

Biology & Microbiology

The skin of sharks is covered with scales called:

a. placoid. b. cycloid. c. ctenoid. d. ganoid. e. circular.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology