NEW NEW Flashcards
1
Q
Characterize the following:
- Primary producer
- Primary consumer
- Secondary consumer
- Tertiary consumer
- Quaternary consumer
A
Primary producer = plants (autotrophs)
Primary consumer = insects (grasshopper)
Secondary consumer = Rat
Tertiary consumer = Snake
Quaternary consumer = Hawk
***Each food chain will end with the top predator
2
Q
What is the difference between:
- Stabilizing selection
- Directional selection
- Disruptive selection
A
Stabilizing selection = no high or low peaks
Directional selection = Selects for extreme (insecticides)
Disruptive selection = Selects against intermediate form
3
Q
When does an organism exhibit exponential growth?
A
When the birth rate is slightly above the death rate and both rates are CONSTANT
4
Q
What vein in the body brings blood from vili to the liver?
A
Hepatic portal vein
