The Living Creation
A student says, “My beliefs affect how I understand the world.”
What concept from the lesson does this describe?
Worldview
What is energy?
Energy is the ability to do work or cause change.
An ecologist studies one eagle living in a forest. What ecological level is being studied?
Individual
What process changes liquid water into water vapor?
Evaporation
Evaporation is the process in which liquid water changes into water vapor.
What are the three statements of cell theory?
A dog, tree, human, and bacterium may look completely different. What characteristic do they all share?
They are made of one or more cells.
What is the difference between a physical and chemical change?
A physical change changes the appearance or state of matter without creating a new substance. A chemical change creates a new substance with different properties.
What is the difference between a population and a community?
A population consists of organisms of the same species living in an area. A community contains different populations living and interacting in the same area.
What is a limiting factor?
A limiting factor is something that prevents a population from growing indefinitely, such as limited food, water, space, disease, or predation.
What is the main difference between prokaryotic and eukaryotic cells?
Prokaryotic cells do not have a membrane-bound nucleus, while eukaryotic cells have a nucleus.
A person eats food, digests it, and uses the nutrients to produce energy. Which characteristic of life is demonstrated?
Metabolism
What is diffusion?
The movement of particles from an area of high concentration to low concentration.
What is the difference between habitat and niche?
Habitat = where an organism lives.
Niche = the organism's role and how it interacts with its environment.
How are exponential and logistic growth different?
Exponential growth occurs rapidly when resources are abundant. Logistic growth begins rapidly but slows as resources become limited and the population approaches carrying capacity.
Which organelle controls cell activities, and which organelle makes proteins?
The nucleus controls cell activities, while the ribosome makes proteins.
A plant bends and grows toward sunlight. Which characteristic of life is demonstrated?
Response
What is the difference between a reactant and a product?
Reactants are the starting substances; products are the substances formed by the reaction.
Why can an ecosystem be affected when one population decreases greatly?
Organisms depend on one another and on their environment. A major decrease in one population can affect food sources, predators, competitors, and other organisms.
What is the difference between primary and secondary succession?
Primary succession begins where little or no soil exists.
Secondary succession begins where soil remains after a disturbance.
What happens to water in a hypertonic solution?
Water moves out of the cell.
A human body is organized as:
Cells → ______ → ______ → ______ → Organism
Cells → Tissues → Organs → Organ Systems → Organism
A substance speeds up a reaction without being used up. What is it called, and what biological molecule performs this role?
Catalyst & Enzyme
A catalyst speeds up a chemical reaction without being used up. An enzyme is a biological catalyst.
Why is a food web generally more complex than a food chain?
A food web contains many interconnected food chains because organisms often have more than one food source and may be eaten by different organisms.
A species disappears from an ecosystem. Explain two possible effects this could have on the ecosystem.
When a species becomes extinct, biodiversity decreases and the food web may change, potentially affecting other organisms that depended on that species.
A cell is placed in a solution where water moves into the cell. What type of solution is it, and what could happen to the cell?
The solution is hypotonic because water moves into the cell. The cell may swell as water enters.