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;
36 Cards in this Set
- Front
- Back
population density
|
*the number of individuals per unit area.
|
|
Three important characteristics of population?
|
1. geographic distribution
2. density 3. growth rate |
|
Logistic growth
|
*resource become less available, the growth of a population slows or stops.
|
|
When a mutation happens to the coding section of DNA what happens?
|
The faulty proteins are created.
|
|
Threats to biodiversity
|
*human activity can reduce biodiversity by altering habitats, hunting species to extinction, introducing toxic compounds into food webs, foreign species to new environments.
|
|
Density-Independent Factors
|
*Unusual weather, natural disasters, seasonal cycles, and certain human activities-such as dammning river and clear-cutting forests are all examples.
|
|
carrying capacity
|
*The number of species an environment can hold. Looks like a stable flat line on graph.
|
|
exponential growth
|
*occurs when the individuals in a population reproduce at a constant rate.
|
|
Conservation
|
*focuses on protecting the entire ecosystems as well as sngle species.
|
|
Immigration
|
*The movement of individuals into an area.
|
|
What are some causes of mutations?
|
sunlight, smoking, chemical spills,
|
|
Does each person have their own unique DNA?
|
Yes Then you can know who left a cell anywhere.
|
|
Emigration
|
*The movement of individuals out of an area.
|
|
endangered species
|
**a population size id declining in a way that places it in danger.
|
|
endangered species
|
*the population of an endangered species declines, the species loses genetic diversity.
|
|
3 factors that affect population size
|
1. number of births
2. number of individuals 3. enter or leave a population |
|
habitat fragmentation
|
*development that splits into ecosystems.
|
|
Invasive species
|
*reproduce rapidly.
*increase because their new havitat lacks the parasites and predators that control their population. |
|
A decrease in nutrients in an ecosystem does what to the growth rate?
|
Less nutrients (resources) will cause a decrease in growth rate.
|
|
How do you do a karotype?
|
To do a karotype take a picture of any cell of a person except sex cells (gametes)
|
|
What is the basic unit of DNA?
|
The basic unit of DNA is a nucleotides.
|
|
Before a cell can divide what happens to the DNA?
|
The DNA needs to be copied (called replication)
|
|
Age structure diagrams
|
*show the population of a country browken down by gender
|
|
If a mutation happens in a gamete what will happen?
|
It will pass on the mutation to the next generation. (Example: the disease: PKD)
|
|
DNA has the code to tell cells how to make what?
|
DNA has the code to tell cells how to make proteins.
|
|
Information about your heredity is found where?
|
Heredity is found coded in your DNA.
|
|
Why can't chickens and finches interbreed (have babies together?)
|
Chickens and finches can't interbreed because their DNA is different.
|
|
Errors in copying and proofreading during replication cause what?
|
Errors in copying and proofreading during replication cause mutations.
|
|
How do you sequence DNA to it's complemntary strand?
|
G to C; C to G; A to T; T to A;
ex. ACCTG becomes TGGAC |
|
What causes growth in an organism?
|
Things grow because cell division create more cells.
|
|
All genetic disorders were originally caused by what?
|
A mutaion of DNA
|
|
Smoking can cause what?
|
Mutation of lung cells. We call this cancer.
|
|
THE 2 daughter cells do what with the original cytoplasm?
|
They each get half of the cytoplasm.
|
|
What kind of reproduction method does bacteria use ?
|
Asexual
|
|
What is cancer?
|
Cancer is a mutation that causes uncontroled cell division
|
|
If a mutation happens in any cell that is not a gamete cell what will happen?
|
The mutation
will only affect the individual. |