BIO Exam 4
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
What is population size?
total number of individuals
What is population density?
number of individuals per unit area
To estimate population size biologists use 3 methods listed on the slide. What are they?
Quadrat, Transect, Mark and Recapture
What are the three main patterns of spacing of a population?
• Clumped • Uniform • Random
What causes the spacing of a population?
resource availablitiy
Type I survivorship curve has how many offspring and what type of care?
low mortality in early and middle years and occurs mostly in older individuals
Type II survivorship curve has how many offspring and what type of care?
mortality is relatively constant throughout the entire life span
A curve that is J-shaped is what kind of growth
exponential
A curve that is S-shaped is what kind of growth
logistical
What are the 4 factors that influence how fast a population grows
• Birth rate • Mortality rate • Emigration • Immigration
How are individuals moving when emigrating?
away from the population
How are individuals moving when immigrating?
moving to the population
What natural abiotic events can limit population size
natural phenomena such as water events
What biotic events can limit population size?
• Predator • Disease • Parasites • Competition
When human population grows animal (BLANK) increases?
extinction
What is carrying capacity
max population size a particular enviornment can support
Quadrats, transect, and mark and recapture sampling are all used to
estimate population size
The human population currently shows
exponential growth
The maximum population size that a particular environment can support is called
carrying capacity
Where is the biosphere
thin outer layer of the earth
What does the biosphere do?
support life (all organisms live here)
Define Ecology
Study of the relationship of organisms to their environment
Define population
group of individuals of a single species living in close proximity and capable of interbreeding
What defines a habitat?
This is where the organisms live (the address-where we go to find it)