Where are the molecules used to carry out photosynthesis encoded?
A) All are encoded in chloroplast DNA.
B) Some are encoded in chloroplast DNA and others in nuclear DNA.
C) All are encoded in nuclear DNA.
D) Some are encoded in nuclear DNA and others in mitochondrial DNA.
B) Some are encoded in chloroplast DNA and others in nuclear DNA.
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Which of the following is considered to be a plant behavior?
A. response to sunlight B. response to plant hormones C. response to touch D. response to gravity E. all of the choices
How do endotherms and ectotherms derive most of their body heat?
A. Both ectotherms and endotherms derive most of their body heat through their environment. B. Ectotherms derive most of their body heat through their environment, while endotherms derive most of their body heat through metabolic processes. C. Both ectotherms and endotherms derive most of their body heat through metabolic processes. D. Ectotherms derive most of their body heat through metabolic processes, while endotherms derive most of their body heat through their environment E. Ectotherms derive most of their body heat through their fur, while endotherms derive most of their body heat through insulating scales.
Which of the following may occupy more than 90% of a mature plant cell's volume?
a. chromoplasts b. the rough endoplasmic reticulum c. the central vacuole d. the nucleus
A defective ribosome would have the MOST detrimental effect on
A. translation. B. replication. C. replication and translation. D. replication and transcription. E. transcription.