Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
45 Cards in this Set
- Front
- Back
|
What is the formula for respiration?
|
Carbon Dioxide + Water ------> light energy glucose + oxygen
|
|
|
What is the formula for photosynthesis?
|
glucose + oxygen -------> energy
carbon dioxide + water |
|
|
What is a stomate?
|
Tiny opening on the surface of the leaf through which gas and water molecules pass through.
|
|
|
What is an organism?
|
A living thing.
|
|
|
What does an organism obtain from its environment?
|
Food, water, shelter, and other things it needs to live, grow and reproduce.
|
|
|
What is a habitat?
|
An environment that provides the things an organism needs to live, grow and reproduce.
|
|
|
Why do different organisms live in different habitats?
|
They have different requirements for survival.
|
|
|
What are biotic factors?
|
The living parts of a habitat?
|
|
|
What are abiotic factors?
|
Nonliving parts of a habitat.
|
|
|
Name five abiotic factors.
|
Water, sunlight, oxygen, temperature, soil.
|
|
|
What is a species?
|
A group of organisms that are physically similar to each other, can make and reproduce, and produce offspring that can do the same.
|
|
|
What is a population?
|
All the members of one species in a particular area.
|
|
|
What is a community?
|
All the different populations that live in an area.
|
|
|
What is ecology?
|
The study of how living things interact with each other and their environment.
|
|
|
What are the levels of organization from smallest to largest?
|
Organism, population, community, ecosystem.
|
|
|
What are the four methods of determining the size of a population?
|
Direct Observation,Indirect observation, Sampling, and Mark-and-Recapture studies.
|
|
|
What is direct observation?
|
Counting all its members.
|
|
|
What is indirect observation?
|
Observing signs of organisms, instead of the organisms themselves.
|
|
|
What is sampling?
|
Estimating by finding the number of organisms in a small area and then multiplying to find the number in a larger area.
|
|
|
What is Mark-and-recapture studies?
|
Catch the organism, mark it and release it. Capture turtles again and count how many are marked, then multiply by size of area.
|
|
|
What is an estimate?
|
An approximation of a number, based on reasonable assumptions.
|
|
|
How can populations change in size?
|
When new members join the population or members leave, possibly by birth or death, immigration or emigration.
|
|
|
What is population density?
|
The number of individuals in an area of specific size.
|
|
|
How is population density measured?
|
PD = Number of individuals
Unit area |
|
|
What is a limiting factor?
|
An environmental factor that causes a population to decrease.
Some limiting factors are food, water, space, and weather conditions. |
|
|
What is carrying capacity?
|
The largest population that an area can support.
|
|
|
What is immigration?
|
Moving into a population.
|
|
|
What is emmigration?
|
Leaving a population.
|
|
|
What is birth rate?
|
The number of births in a population in a certain amount of time.
|
|
|
What is death rate?
|
The number of deaths in a population in a certain amount of time.
|
|
|
What is natural selection?
|
Individuals whose unique characteristics are better suited for their environment survive and reproduce. Offspring then inherit these characteristics and reproduce. This results in a adaptations.
|
|
|
What are adaptations?
|
That behaviors and physical characteristics that allow organisms to live successfully in their environments.
|
|
|
What is a niche?
|
This includes the type of food an organism eats, how it obtains this food, which other organisms eat it, how and when the organism reproduces and the physical conditions that it requires to survive.
|
|
|
What is competition?
|
The struggle between organisms to survive as they attempt to use the same limited resource.
|
|
|
What are the three types of interactions among organisms?
|
Competition, predation and symbiosis.
|
|
|
True/False: Two organisms can live in the same niche?
|
False. : P
|
|
|
What is predation?
|
An interaction when one organism kills another for food.
|
|
|
What is symbiosis?
|
A close relation between two species, that benefits at least one of the species.
|
|
|
What are the three types of symbiotic relationships?
|
Mutualism, Commensalism and Parasitism.
|
|
|
What is the process of the water cycle?
|
Evaporation, condensation and evaporation.
|
|
|
What is the carbon cycle?
|
Producers take in carbon dioixde gas and use it for photosynthesis and convert it to oxygen. Consumers take in the oxygen and convert it to carbon dioxde.
|
|
|
What is the oxygen cycle?
|
Producers release oxygen as a result of photosynthesis. Then organisms take in oxygen from the air and use it to carry out their life processes.
|
|
|
What is the nitrogen cycle?
|
In the nitrogen cycle, nitrogen moves from the air to the soil into living things and back into the air.
|
|
|
What is nitrogen fixation
|
The process of changing free nitrogen into a usable form of nitrogen.
|
|
|
What performs nitrogen fixation?
|
Legumes.
|
