All flashcards
Flashcard 1: What is meant by resource availability when analyzing organism growth data?
Answer: The amount of needed resources (food, water, light, space) present. Resources are materials organisms need to survive and grow.
Flashcard 2: What is a limiting resource in the context of individual organism growth?
Answer: A resource in shortest supply that restricts growth rate. When one resource runs out first, it controls overall growth rate.
Flashcard 3: What does it mean if two groups have equal resources except water, and one grows less?
Answer: Water is likely the limiting resource for growth. Different growth with only water varying shows water controls growth.
Flashcard 4: Identify the independent variable when organism growth is measured at different food amounts.
Answer: Food amount provided. The manipulated variable (food) is changed to observe its effect.
Flashcard 5: What is the best conclusion if growth rises with resource level, then levels off at high levels?
Answer: A different factor becomes limiting at higher resource levels. Growth plateaus indicate a new resource has become limiting.
Flashcard 6: Which option best indicates competition is affecting growth in crowded conditions?
Answer: Individual growth decreases as density increases. Crowding causes resource competition, reducing individual growth.
Flashcard 7: What does a negative correlation between population density and individual growth suggest?
Answer: More competition for limited resources reduces growth. Higher density means less resources per individual, reducing growth.
Flashcard 8: Identify the best control group for testing fertilizer effects on plant growth.
Answer: Plants grown with no fertilizer but otherwise identical conditions. Controls match all conditions except the tested variable (fertilizer).
Flashcard 9: Which resource is most directly linked to plant biomass increase in most growth experiments?
Answer: Light (energy for photosynthesis). Photosynthesis converts light energy into plant biomass.
Flashcard 10: What is the most appropriate conclusion if two groups differ only in light, and one is taller?
Answer: Greater light availability increased growth. Only light differs, so light must cause the height difference.
Flashcard 11: What does it suggest if growth varies widely within the same resource level group?
Answer: Other variables or individual differences are influencing growth. High variation indicates uncontrolled factors affect growth.
Flashcard 12: Which graph type is most appropriate for showing growth over time under fixed resources?
Answer: Line graph. Line graphs show continuous change in one variable over time.
Flashcard 13: Identify the best claim if plants with more nitrogen have higher average mass in the data.
Answer: Increased nitrogen availability is associated with increased plant growth. Correlation between nitrogen levels and mass suggests causation.
Flashcard 14: Which graph type is most appropriate for comparing final masses across resource treatments?
Answer: Bar graph. Bar graphs compare discrete categories (different treatments).
Flashcard 15: What does it indicate if the same organism grows faster at 25°C than at 10°C with equal food?
Answer: Temperature affects growth rate even when food is constant. Temperature is an environmental factor that affects metabolic rate.
Flashcard 16: What is the correct interpretation if a resource increase causes no growth change in the data?
Answer: That resource was not limiting under those conditions. No response means that resource isn't limiting growth.
Flashcard 17: What is the formula for average growth rate if mass changes from m1 to m2 over time t?
Answer: tm2−m1. Rate equals change in mass divided by time elapsed.
Flashcard 18: What is the dependent variable in a study testing how food affects growth?
Answer: Growth (for example, mass gain or length increase). The measured outcome that changes in response to food levels.
Flashcard 19: What is the limiting resource in a population?
Answer: The resource in shortest supply that restricts growth. Like a bottleneck, it's the scarcest resource that controls population size.
Flashcard 20: What is resource availability in an ecosystem?
Answer: The amount of usable resources accessible to organisms. Measures how much organisms can actually obtain and use resources.
Flashcard 21: What is meant by individual organism growth in data analysis?
Answer: Increase in size, mass, or biomass of one organism over time. Tracks changes in a single organism, not the whole population.
Flashcard 22: Which resource is most likely limiting for plants in low-light habitats?
Answer: Light. Photosynthesis requires light; darkness limits plant growth most.
Flashcard 23: Which resource is most likely limiting for aquatic plants in murky water?
Answer: Light. Turbidity blocks sunlight needed for photosynthesis.
Flashcard 24: Which resource is most likely limiting for terrestrial animals during drought?
Answer: Water. Animals need water for survival; drought creates severe scarcity.
Flashcard 25: Which resource is most likely limiting for herbivores when plant biomass is low?
Answer: Food. Herbivores depend entirely on plants for energy and nutrients.
Flashcard 26: What is the independent variable in a study testing how food affects growth?
Answer: Food availability (amount or concentration provided). The factor being manipulated to test its effect on growth.
Flashcard 27: What is a control group in an experiment on resource availability and growth?
Answer: The group kept under standard conditions for comparison. Provides baseline data to compare against experimental treatments.
Flashcard 28: Identify the best conclusion when increased nutrient supply raises plant mass gain.
Answer: Nutrients were limiting growth under the lower-nutrient condition. Growth improved when the limiting factor was increased.
Flashcard 29: Identify the best conclusion when added water does not change growth rate.
Answer: Water was not the limiting resource in those conditions. If water were limiting, adding it would increase growth.
Flashcard 30: Which option best describes a dose-response pattern in growth data?
Answer: Growth increases as resource level increases, then may level off. Shows typical saturation curve as resources increase.