Species that are found in only one area are called ____________________ and are especially vulnerable to extinction
Fill in the blanks with correct word
endemic species
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Desertification is
A) expansion of the desert due to the seasonal changes in precipitation. B) expansion of the desert due to human degradation of the environment. C) expansion of the desert due to loss of biodiversity. D) desert belts that extend across the north of the continent. E) removal of vegetative cover from tropical environments.
The addition of water to the zone of saturation is known as ____________________
Fill in the blank(s) with correct word
Which of the following are not protists?
A. foraminiferans B. ciliates C. cyanobacteria D. diatoms E. dinoflagellates
Biodiversity enhances human food security because it ________
A) decreases the number of predators B) means that there is genetic uniformity C) is a potential source of new food items or new genetic varieties of existing foods D) reduces the number of pollinators available to any one plant species E) increases the number of available pathogens