What is an environmental result from burning fossil fuels?
a. the release of greenhouse gases into the air
b. the release of smoke into the environment
c. the production of carbon monoxide
d. the release of sulphur into the environment
e. the production of smog
Answer: a. the release of greenhouse gases into the air
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The ____ are limited to three groups of proteobacteria
a. chemoautotrophs only b. chemoheterotrophs c. photoautotrophs d. photoheterotrophs only e. chemoautotrophs and photoheterotrophs
Shortly after fertilization, successive cell divisions convert the zygote into a multicellular embryo during a process
known as ____.
a. meiosis b. parthenogenesis c. gastrulation d. cleavage e. blastulation
Active transport may be described as all of the following EXCEPT
a. is concerned with establishing the resting potential of a neuron. b. counters the process of diffusion. c. allows transport of atoms across the plasma membrane of the neuron against the concentration gradient. d. uses energy to power transport. e. physically blocking transport.
The Krebs cycle requires
A. a four-carbon acid. B. coenzyme A (CoA). C. an acetyl group (2C). D. All of these answers are true.