Carolus Linnaeus
A. created the five-kingdom classification system.
B. was the first person to attempt to systematically classify organisms.
C. introduced the binomial system of nomenclature.
D. developed a theory of evolution based on the similarities between organisms.
C. introduced the binomial system of nomenclature.
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Based on composition similarities, actin can be divided into two major groups: the muscle-specific actins (________-actin) and nonmuscle actins (________- and ________-actin).
Fill in the blank(s) with the appropriate word(s).
Some people take creatine as a bodybuilding supplement. Describe the action of creatine in cells and why physicians do not recommend this supplement
What will be an ideal response?
Biosphere II is a huge dome-covered self-contained structure located outside Tucson, Arizona. Biosphere II was built to try to duplicate Earth's biosphere and ecosystems in miniature and to use the information gained from the experiment to help design similar habitats on the Moon and Mars. The habitat contained small versions of many of Earth's ecosystems, including an ocean with a coral reef, mangrove wetlands, a grassland, a desert, an agricultural system, and a human habitat. Eight men and women were sealed inside the habitat for a proposed two-year stay. The air, water, and food for the "biospherians" all came from inside the sealed habitat, and their only contact with the outside was through computers and telephones. Before the two years were up, however, the experiment failed.
Supplemental oxygen was pumped into the facility and food supplies were provided through the airlocks. What caused the failure of the experiment? It was traced to nutrient pollution. The soil in some of the biosphere ecosystems was unusually rich in nutrients. These excess nutrients caused a huge population explosion in decomposer bacteria, which led to oxygen depletion. How could a population explosion of bacteria lead to oxygen depletion? What will be an ideal response?
You recently discovered a new photosynthetic bacterial cell. Based on your knowledge of prokaryotes, what else should be present in the cell?
A. mitochondria B. viral DNA C. chloroplasts D. many infolds of the plasma membrane E. additional plasmids