Ecologists study ____________________ in nature
Fill in the blanks with correct word
connections
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Which of the following are the oxygen-carrying proteins found in blood?
A. platelets B. red blood cells C. hemoglobin D. white blood cells
Why doesn't the Moon fall toward Earth like apples do?
A. Moon does fall, but it falls around Earth due to its tangential motion. B. The great distance of the Moon prevents falling C. Moon does fall but its great distance keeps it from getting closer. D. Moon's small mass prevents falling.
Which of the following best matches the description?Parasite that lives on the outside of its host.
A. producer B. carbon cycle C. secondary consumer D. herbivore E. biomass F. nitrogen-fixing bacteria G. interspecific competition H. community I. intraspecific competition J. nitrogen cycle K. trophic level L. ectoparasite M. omnivore N. limiting factor O. denitrifying bacteria P. habitat
Costa Rica is classified as a(n) ________ economy by the UN
A) low B) lower middle C) upper middle D) high