Why is it wiser (ecologically and economically) to eat a diet with more plants in it than one with more meat?
What will be an ideal response?
Energy is lost as it is transferred from one trophic level to the next. Only 10% of the energy in a given food source is available to an organism in the next trophic level. There is more energy in food material closer to the primary production than at the carnivore end of the food web. There is more available energy in plant material than in a comparable amount of meat material. Plant matter is also cheaper and easier to store and ship to areas where food is scarce, a definite advantage over shipping animal products. Increasing world population levels would seem to require that we eat more plants and fewer animals.
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The name Lactococcus (Streptococcus) lactis
A. indicates that the subgenus is Streptococcus. B. indicates that the family is Lactococcus. C. indicates that Streptococcus is the old genus name. D. indicates that Lactococcus is the old class name.
The sipunculid worms are also called:
a. peanut worms. b. lugworms. c. innkeeper worms. d. fanworms. e. beardworms.
In __________ speciation, populations in contact along a common border speciate. Fill in the blank(s) with the appropriate word(s)
Which of the following represents the first line of defense against unwanted pathogens?
a. phagocytes b. intact skin c. T cell-mediated immunity d. antibody-mediated immunity