Biology, 17.10.2019 22:20 deswqdqwwdq
Long term trends over geological history in speciation and extinction rates can be partially explained by
a. natural selection in small populations
b. over harvesting by humans
c. plate tectonics and continental drift
d. short term changes in present day environment
Answers: 3
Biology, 22.06.2019 09:00
This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.
Answers: 1
Biology, 22.06.2019 12:30
Are the layers of rock above and below the coal older or younger?
Answers: 1
Biology, 22.06.2019 14:00
Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !
Answers: 2
Long term trends over geological history in speciation and extinction rates can be partially explain...
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