The idea that organisms with genetically determined characteristics that make them better suited for the environment will have more surviving offspring is
A. the inheritance of acquired characteristics.
B. the Hardy-Weinberg concept.
C. the theory of natural selection.
D. convergent evolution.
C. the theory of natural selection.
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Why would soil and water be added to a compost pile?
A. The organisms in the soil, along with the moisture from the water, would facilitate the natural decomposition of the material in the compost pile. B. Without adding soil and water, no decomposition of the material can take place. The material would simply sit there. C. Water is the medium that photosynthetic organisms use to break down the organic materials in the compost pile. D. Soil spreads out the material in the pile. If the material is too close together, natural aeration cannot occur and decomposition stops.
The method of reasoning that uses construction of general principles by careful examination of many specific cases is called:
A. experimental reasoning. B. theoretical reasoning. C. inductive reasoning. D. hypothetical reasoning. E. deductive reasoning.
A recent study of the effects of the general anesthetic isoflurane suggests that it has a direct
impact on an organism’s biological clock. This study focused on honeybees because their clock genes are similar to those found in mammals. Prior to the start of this study, bees were trained to fly to an artificial flower to obtain sugar water and then return to the hive. In this study, researchers caught the bees as they approached the artificial flower. Half of the bees were anesthetized, and the other half were contained and not allowed to return to the hive immediately. After six hours, when all the anesthetized bees had awoken, both groups of bees were released. Honeybees use the sun to navigate, and their biological clock allows them to correct for the time of day. The bees that were not anesthetized flew directly to the hive, making adjustments for the time of day. However, those that were anesthetized made adjustments as if the time were hours earlier and flew at the wrong angle. Doctors report that people often emerge from general anesthesia disoriented in time and may sleep fitfully for a while afterward. Based on the honeybee study, researchers are looking into ways to keep the internal clock ticking normally even during surgery.
In a natural system, honeybees as well as the flowers they feed on and pollinate would be considered a(n)
a. ecosystem. b. population. c. community. d. organ system.
How do cyclin-dependent kinases help regulate the cell cycle?
What will be an ideal response?