Unit 4 Definitions Flashcards
(22 cards)
What is a population
All of the organisms of one species in a habitat
What is a community
All if the different populations of species in a habitat
What is habitat
A place where an organism lives
What is an ecosystem
A mix of different communities and habitats and how they interact based on biotic and abiotic factors
What is an ecological niche
The organisms role within an ecosystem and its interaction with abiotic and biotic factors
What does a survival curve show
The percentage of the population still alive at each age
How do you calculate the life expectancy from a survival curve
Measure the age at which fifty percentage of the individuals are alive
What is a demographic transition model
Graph to represent how countries change with development
What does a population pyramid with a wide base and a narrow top show
A developing country
High birth rate
Increasing population
Young population
What does a population pyramid with a narrow base and a wide middle show
Developed country
Low birth rate
Decreasing population
Old population
What’s the structure of ATP
1 adenosine
3 phosphate
Ribose sugar
Where does ATP carry energy
In its bonds
What 3 ways can ATP be formed
Photo Phosphorylation, light dependent stage of photosynthesis
Substrate level phosphorylation, kerbs cycle and glycolysis
Oxidative Photophosphorylation, electron transport chain
What makes ATP from a good source of energy
Immediate, only need to break one weak bond
Manageable, releases small amount of energy so none is wasted
Give 4 uses of ATP from respiration in organisms
Active transport
Protein synthesis
Maintenance of body temperature
DNA replication
What is photosynthesis
Using light energy to make glucose
Occurs in plants to use the glucose in respiration
Give 3 adaptations of plants for photosynthesis
Leaf near top of plant, closer to light
Leaf is thin and wide, large sa and short dp
Palisade cell has many chloroplasts, the site of photosynthesis
How to measure the rate of photosynthesis in two ways
Measure amount of co2 used
Or measure amount of O2 produced using photosynthometer
How does a photosynthometer work and calculate the rate of photosynthesis
Surround plant in sodium hydrocarbon ate solution
Collect O2 in capillary tube
Convert amount collected into volume using pie r squared
Volume divided by time to calculate the rate
How does limiting light on the Calvin cycle effect ribulose biphosphate
Rbp decreases as being converted into GP but no reformation by triode phosphate as there’s no ATP
How does limiting light on the Calvin cycle effect glycerate phosphate
GP increases as not converted into triose phosphate as there’s no ATP but is for me by rbp
What is a species
A group of organisms with similar characteristics that can interbreed to produce fertile offspring
