Which of the following levels of ecological interaction are arranged from most inclusive to least inclusive?
a. community, biosphere, ecosystem, population
b. ecosystem, community, biosphere, population
c. population, community, ecosystem, biosphere
d. ecosystem, biosphere, community, population
e. biosphere, ecosystem, community, population
E; The biosphere is the most general level and includes all the others. An ecosystem includes communities and communities are comprised of populations.
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Some protist cell surfaces have __________, including silica or calcium carbonate.
Fill in the blank(s) with the appropriate word(s).
Earth is essentially a closed system with respect to ____
a. energy b. matter c. oxygen d. photosynthesis e. ecosystems
The phase of mitosis in which the nuclear envelope breaks into small pieces is
A. D, which is anaphase. B. B, which is prometaphase. C. B, which is prophase. D. C, which is metaphase. E. C, which is telophase.
Before a stoma opens, ____
a. the level of carbon dioxide inside the leaf increases b. potassium ions are actively transported out of guard cells c. potassium ions are actively transported into guard cells d. the turgor pressure inside the guard cells decreases e. water moves by osmosis out of the guard cells