What was the greatest contributing factor to the dodo bird extinction on the island of Mauritius?
a. sailors overharvested them for food
b. rats, cats, and pigs introduced by sailors
c. climate change caused by humans
d. their predators went extinct
e. rising sea levels made the island smaller
ANSWER: b
You might also like to view...
The accumulation of free oxygen in the atmosphere ____
a. was a result of the accumulation of a byproduct of a type of photosynthesis b. caused the further spontaneous generation of life c. provided the opportunity to extract more energy through anaerobic respiration d. occurred immediately after the earth was formed e. allowed for DNA to replace RNA as the primary data storage molecule
Anabolic reactions do not ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about a complete digestive system is false?
a. It is characteristic of flatworms. b. It is a tube with two openings. c. Its regions are specialized to perform specific functions. d. Food can be ingested while previously eaten food is being digested. e. Food enters the mouth and is eliminated through the anus
The NADPH required for carbon dioxide fixation during the Calvin cycle is formed
A) only in C4 plants. B) by the reduction of oxygen. C) during the light reactions. D) in the mitochondria. E) by the hydrolysis of ATP.