Which of the following statements is false?
1.We are in the midst of a slowly increasing trend towards species extinction.
2.Most of the causes of the current species extinction are natural causes.
3.Dodos most likely became extinct because of destruction by animals other than humans.
4.The origins of our current extinction event began tens of thousands of years ago.
2
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What are some challenges land plants face compared to life in the water?
A. Obtaining resources from the air and soil instead of from water B. Obtaining and retaining moisture C. Staying upright against the pull of gravity D. All of the above are challenges faced by land plants.
Why is it necessary for various organisms to engage in fermentation?
a. To regenerate NAD+ for glycolysis b. To metabolize ATP for chemiosmosis c. To acquire and transport enzymes d. To convert CO2 into glucose
Which abiotic factor affects the growth rate of aquatic species?
a. Water temperature b. Water movement c. Dissolved solids d. Salt content
Which of the following is the best definition of
sympatric speciation? a. species that evolve due to geographical distance b. mechanical isolation acts to prevent speciation c. breeding behavior that prevents the organisms from breeding due to differences in their breeding time d. ecological isolation e. evolutionary change that creates two species occupying the same space