Which of the following provides the best example of the parts of a system working together to achieve a specific function?
A-Specialized cells in a plant’s leaf open and close in response to changing conditions.
B-Red blood cells are capable of transporting oxygen because of their chemical composition.
C-Glands in the mouth, the stomach, the pancreas, and the small intestine secrete chemicals that break down nutrients.
D-Animals that prey on other animals require the ability to move about in their environment.
Answers: 3
Biology, 21.06.2019 14:20
Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere
Answers: 2
Biology, 21.06.2019 15:00
Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.
Answers: 2
Biology, 21.06.2019 19:00
Study the image of this rock.which characteristic best supports its formation from sedimentary processes? it has many layers.it is coarse-grained.its grain shape is round.its texture is non-banded.
Answers: 1
Biology, 22.06.2019 11:30
Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
Answers: 1
Which of the following provides the best example of the parts of a system working together to achiev...
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