As an overall average, about ______ of the energy at one trophic level is generally available to the next highest rank in the food chain.
A. two percent
B. ten percent
C. four percent
D. seven percent
E. twenty percent
Answer: B. ten percent
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The alcohol wipe used on a patient's skin before an injection is an example of ________.
A. disinfection B. sanitization C. sterilization D. decontamination E. antisepsis
The concept of nuclear equivalence states that:a
all of the somatic cells in an adult organism have the same genes. b. the genes of the individuals of the same species are exactly the same. c. as cells mature, unneeded genes are lost. d. the nuclei of all organisms are the same. e. nuclei of individuals of the same species are the same size.
For how many years did the human race rely upon hunting and gathering, with no agriculture?
A) 1,500,000 years B) 1,000,000 years C) 500,000 years D) 250,000 years
Mitochondria and chloroplasts are similar to one another in that both:
A) capture the energy of the sun during photosynthesis and store it as sugar. B) convert the energy of the sugar into ATP for use by the cell. C) have their own DNA and their own ribosomes. D) are present in all eukaryotic cells.