A researcher studying a group of individuals of the same species living and interacting in a shared environment is said to be working at the level of a
A) biome.
B) biosphere.
C) community.
D) population.
Answer: D) population.
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Which of the following conditions is NOT caused by a deficiency of a water-soluble vitamin?
a. beriberi b. pellagra c. rickets d. scurvy e. anemia
Answer the following statements true (T) or false (F)
1. The smallest scale of biological organization is represented organelles. 2. Decomposers are a special group of producers. 3. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the number of tomatoes produced by each plant would be the independent variable. 4. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the number of tomatoes produced by each plant would be the dependent variable. 5. In an experiment designed to determine if a fertilizer increased crop yield in tomato plants, the amount of sunlight and water the plants received would be standardized variables.
Natural selection acts directly on the genotype of an organism
_______ Indicate whether the statement is true or false.
Which of the following statements about monocots is true?
a. They lack sclerenchyma tissue. b. They have a well-developed vascular cambium. c. They do not produce bark. d. Their lateral meristems give rise to wood. e. Secondary growth occurs rather slowly