Resources Affect Growth - Middle School Life Science
Card 1 of 25
What is meant by resource availability when analyzing organism growth data?
What is meant by resource availability when analyzing organism growth data?
Tap to reveal answer
The amount of needed resources (food, water, light, space) present. Resources are materials organisms need to survive and grow.
The amount of needed resources (food, water, light, space) present. Resources are materials organisms need to survive and grow.
← Didn't Know|Knew It →
What is a limiting resource in the context of individual organism growth?
What is a limiting resource in the context of individual organism growth?
Tap to reveal answer
A resource in shortest supply that restricts growth rate. When one resource runs out first, it controls overall growth rate.
A resource in shortest supply that restricts growth rate. When one resource runs out first, it controls overall growth rate.
← Didn't Know|Knew It →
What does it mean if two groups have equal resources except water, and one grows less?
What does it mean if two groups have equal resources except water, and one grows less?
Tap to reveal answer
Water is likely the limiting resource for growth. Different growth with only water varying shows water controls growth.
Water is likely the limiting resource for growth. Different growth with only water varying shows water controls growth.
← Didn't Know|Knew It →
Identify the independent variable when organism growth is measured at different food amounts.
Identify the independent variable when organism growth is measured at different food amounts.
Tap to reveal answer
Food amount provided. The manipulated variable (food) is changed to observe its effect.
Food amount provided. The manipulated variable (food) is changed to observe its effect.
← Didn't Know|Knew It →
What is the best conclusion if growth rises with resource level, then levels off at high levels?
What is the best conclusion if growth rises with resource level, then levels off at high levels?
Tap to reveal answer
A different factor becomes limiting at higher resource levels. Growth plateaus indicate a new resource has become limiting.
A different factor becomes limiting at higher resource levels. Growth plateaus indicate a new resource has become limiting.
← Didn't Know|Knew It →
Which option best indicates competition is affecting growth in crowded conditions?
Which option best indicates competition is affecting growth in crowded conditions?
Tap to reveal answer
Individual growth decreases as density increases. Crowding causes resource competition, reducing individual growth.
Individual growth decreases as density increases. Crowding causes resource competition, reducing individual growth.
← Didn't Know|Knew It →
What does a negative correlation between population density and individual growth suggest?
What does a negative correlation between population density and individual growth suggest?
Tap to reveal answer
More competition for limited resources reduces growth. Higher density means less resources per individual, reducing growth.
More competition for limited resources reduces growth. Higher density means less resources per individual, reducing growth.
← Didn't Know|Knew It →
Identify the best control group for testing fertilizer effects on plant growth.
Identify the best control group for testing fertilizer effects on plant growth.
Tap to reveal answer
Plants grown with no fertilizer but otherwise identical conditions. Controls match all conditions except the tested variable (fertilizer).
Plants grown with no fertilizer but otherwise identical conditions. Controls match all conditions except the tested variable (fertilizer).
← Didn't Know|Knew It →
Which resource is most directly linked to plant biomass increase in most growth experiments?
Which resource is most directly linked to plant biomass increase in most growth experiments?
Tap to reveal answer
Light (energy for photosynthesis). Photosynthesis converts light energy into plant biomass.
Light (energy for photosynthesis). Photosynthesis converts light energy into plant biomass.
← Didn't Know|Knew It →
What is the most appropriate conclusion if two groups differ only in light, and one is taller?
What is the most appropriate conclusion if two groups differ only in light, and one is taller?
Tap to reveal answer
Greater light availability increased growth. Only light differs, so light must cause the height difference.
Greater light availability increased growth. Only light differs, so light must cause the height difference.
← Didn't Know|Knew It →
What does it suggest if growth varies widely within the same resource level group?
What does it suggest if growth varies widely within the same resource level group?
Tap to reveal answer
Other variables or individual differences are influencing growth. High variation indicates uncontrolled factors affect growth.
Other variables or individual differences are influencing growth. High variation indicates uncontrolled factors affect growth.
← Didn't Know|Knew It →
Which graph type is most appropriate for showing growth over time under fixed resources?
Which graph type is most appropriate for showing growth over time under fixed resources?
Tap to reveal answer
Line graph. Line graphs show continuous change in one variable over time.
Line graph. Line graphs show continuous change in one variable over time.
← Didn't Know|Knew It →
Identify the best claim if plants with more nitrogen have higher average mass in the data.
Identify the best claim if plants with more nitrogen have higher average mass in the data.
Tap to reveal answer
Increased nitrogen availability is associated with increased plant growth. Correlation between nitrogen levels and mass suggests causation.
Increased nitrogen availability is associated with increased plant growth. Correlation between nitrogen levels and mass suggests causation.
← Didn't Know|Knew It →
Which graph type is most appropriate for comparing final masses across resource treatments?
Which graph type is most appropriate for comparing final masses across resource treatments?
Tap to reveal answer
Bar graph. Bar graphs compare discrete categories (different treatments).
Bar graph. Bar graphs compare discrete categories (different treatments).
← Didn't Know|Knew It →
What does it indicate if the same organism grows faster at $25\degree\text{C}$ than at $10\degree\text{C}$ with equal food?
What does it indicate if the same organism grows faster at $25\degree\text{C}$ than at $10\degree\text{C}$ with equal food?
Tap to reveal answer
Temperature affects growth rate even when food is constant. Temperature is an environmental factor that affects metabolic rate.
Temperature affects growth rate even when food is constant. Temperature is an environmental factor that affects metabolic rate.
← Didn't Know|Knew It →
What is the correct interpretation if a resource increase causes no growth change in the data?
What is the correct interpretation if a resource increase causes no growth change in the data?
Tap to reveal answer
That resource was not limiting under those conditions. No response means that resource isn't limiting growth.
That resource was not limiting under those conditions. No response means that resource isn't limiting growth.
← Didn't Know|Knew It →
What is the formula for average growth rate if mass changes from $m_1$ to $m_2$ over time $t$?
What is the formula for average growth rate if mass changes from $m_1$ to $m_2$ over time $t$?
Tap to reveal answer
$\frac{m_2 - m_1}{t}$. Rate equals change in mass divided by time elapsed.
$\frac{m_2 - m_1}{t}$. Rate equals change in mass divided by time elapsed.
← Didn't Know|Knew It →
What is the dependent variable in a study testing how food affects growth?
What is the dependent variable in a study testing how food affects growth?
Tap to reveal answer
Growth (for example, mass gain or length increase). The measured outcome that changes in response to food levels.
Growth (for example, mass gain or length increase). The measured outcome that changes in response to food levels.
← Didn't Know|Knew It →
What is the limiting resource in a population?
What is the limiting resource in a population?
Tap to reveal answer
The resource in shortest supply that restricts growth. Like a bottleneck, it's the scarcest resource that controls population size.
The resource in shortest supply that restricts growth. Like a bottleneck, it's the scarcest resource that controls population size.
← Didn't Know|Knew It →
What is resource availability in an ecosystem?
What is resource availability in an ecosystem?
Tap to reveal answer
The amount of usable resources accessible to organisms. Measures how much organisms can actually obtain and use resources.
The amount of usable resources accessible to organisms. Measures how much organisms can actually obtain and use resources.
← Didn't Know|Knew It →
What is meant by individual organism growth in data analysis?
What is meant by individual organism growth in data analysis?
Tap to reveal answer
Increase in size, mass, or biomass of one organism over time. Tracks changes in a single organism, not the whole population.
Increase in size, mass, or biomass of one organism over time. Tracks changes in a single organism, not the whole population.
← Didn't Know|Knew It →
Which resource is most likely limiting for plants in low-light habitats?
Which resource is most likely limiting for plants in low-light habitats?
Tap to reveal answer
Light. Photosynthesis requires light; darkness limits plant growth most.
Light. Photosynthesis requires light; darkness limits plant growth most.
← Didn't Know|Knew It →
Which resource is most likely limiting for aquatic plants in murky water?
Which resource is most likely limiting for aquatic plants in murky water?
Tap to reveal answer
Light. Turbidity blocks sunlight needed for photosynthesis.
Light. Turbidity blocks sunlight needed for photosynthesis.
← Didn't Know|Knew It →
Which resource is most likely limiting for terrestrial animals during drought?
Which resource is most likely limiting for terrestrial animals during drought?
Tap to reveal answer
Water. Animals need water for survival; drought creates severe scarcity.
Water. Animals need water for survival; drought creates severe scarcity.
← Didn't Know|Knew It →
Which resource is most likely limiting for herbivores when plant biomass is low?
Which resource is most likely limiting for herbivores when plant biomass is low?
Tap to reveal answer
Food. Herbivores depend entirely on plants for energy and nutrients.
Food. Herbivores depend entirely on plants for energy and nutrients.
← Didn't Know|Knew It →