26.Which of these species is already considered extinct?
A Philippine eagle
C. Mindanao pygmy fruit bat
B. Tamaraw in Mindoro
Golden toad in Costa Rica27.
Which community has a better ability to withstand environmental changes?
A Dense forest
C. Rice field
B. Farmland with varied crops
D. Pechay in a pot
28.Which statement best describes limiting factors?
А. These are environmental conditions that keep a population from increasing in size and help
balance ecosysiems.
В. These are environmental conditions that increase the population density of all organisms in an
ecosystem
C.
These are physical factors that keep the population size of all organisms equal.
D. These are physical factors that do not directly affect any population of organisms in an
ecosystem
29.A brown tree snake introduced accidentally to Guam has caused extinction of 12 species of birds
and 6 species of lizards. How do exotics moved to new geographical regions adversely affect an
ecosystem?
A Absence of their native competitors, predators, pathogens, and parasites make their
population growth hard to control
B. Exotics that become established in a new habitat make a balanced ecosystem.
C. Introduced exotics improve biodiversity of an ecosystem.
D They increase the carrying capacity of an ecosystem.
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30.Autotrophs produce their own food by converting light energy into chemical energy. What is this
food-making process called?
A Glycolysis
C. Krebs cycle
B Photosynthesis
D. All of the above
31.In what cell organelle does cellular respiration take place?
A Chloroplast
C. Mitochondria
B Ribosome
D. Stomata​