Exam (elaborations)
Biology 104 Unit 1 Exam with correct Answers
- Course
- Institution
Biology 104 Unit 1 Exam with correct Answers
[Show more]
Content preview
Biology 104 Unit 1 Exam with correctAnswers
Ecology - Answer -the study of the interactions of organisms with other organisms and
with the physical environment
habitat - Answer -the place where an organism exists
population - Answer -a group of the same species occupying a certain area
community - Answer -all populations at one locale (e.g., a coral reef population)
ecosystem - Answer -m contains the community organisms and abiotic factors
biosphere - Answer -the layer on the earth where living organisms can live
Demography - Answer -the statistical study of a population, e.g., its density, distribution,
rate of growth
population density - Answer -the number of individuals per unit area.
population distribution - Answer -the pattern of dispersal of individuals across an area
Resources - Answer -nonliving and living components of an environment that support
living organisms.
Limiting factors - Answer -those environmental aspects that particularly determine
where an organism lives.
Examples of Limiting Factors - Answer -Such factors include oxygen supply, light
availability, space, temperature, and precipitation amounts
Example of Biotic Factor - Answer -Biotic factors can be illustrated by red kangaroos
that are limited to inland Australia by the grasses that grow there.
terms used to describe patterns of distribution. - Answer -Clumped, random, and
uniform
, rate of natural increase (r) - Answer -dependent on the number of individuals born every
year and the number of individuals that die every year.
biotic potential - Answer -The highest possible rate of natural increase for a population
when resources are unlimited
Biotic potential depends on 4 things: - Answer -a. # of offspring per reproduction
b. Chances of survival until age of reproduction
c. How often each individual reproduces
d. Age at which reproduction begins
cohort - Answer -all members of a population born at the same time.
Survivorship - Answer -the probability of newborn individuals of a cohort surviving to
particular ages.
A survivorship curve is obtained by - Answer -plotting the number of individuals
surviving at each age, is characteristic of each species.
3 Age Distribution Groups: - Answer -prereproductive, reproductive, and
postreproductive
Age structure diagrams - Answer -used to determine past and future history of a
population.
The 2 Population Growth Models: - Answer -Exponential Growth & Logistic Growth
Exponential Growth - Answer -the number of individuals added each generation
increases as the total number of females increases.
Logistic Growth - Answer -When growth encounters environmental resistance
density-independent factors - Answer -Abiotic factors that regulate population.
(Tornados, hurricanes, tsunami, forest fires, etc...)
density-independent factors show ____ ____________ with the size of the population. -
Answer -no correlation
Predation, parasitism, and competition - Answer -considered density-dependent; the
more these organisms crowd together, the more damaging are the food shortages, the
parasites, and the predators
density-dependent factors have some effect relative to the ______ of the population. -
Answer -size
Populations vary on particulars such as: - Answer -Fecundity, Maturity, and Parity
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller millyphilip. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now