Biology Questions and Answers
Population Ecology
- What is a population?
In Biology a population is a set of
individuals oa given place f the same sand in a given time.pecies living in
- What is population density?
Population density is the relation
between the number of individuals of apopulation and the area or volume they (^)
occupy. For example, in 2001 the
human population States (according to thdensity of the Unitede World Bank)
was 29.71 inhabitants per square
kilometer andensity of 135.41 d China had a populationhumans per square (^)
kilometer.
- What is population growth
rate?
Population growth rate (PGR) is the
percent variation bof individuals in a populatioetween the numbern at two
different times. Therefore the populationgrowth rate can be positive or negative.
- How different are the
concepts of migration,
emigration and immigration?
Migration is tha species from one place to e moving of individuals ofanother.
Emigration is thexit of individuals from one region (toe migration seen as an
another where they will settle
permanently or temporarily).Immigration is the migration se (^) en as
the settling in one region (permanently
or temporarily) of from another region. Thereforeindividuals coming
individuals eimmigrate "to".migrate "from" and
- What are the main factors
that affect the growth of a
population?
The main factors that make grow are births and immigration. populationsThe
main factors that make populations
decrease are deaths and emigration. - What are some examples of
migratory animals?
Examples osouthern right whales ff migratory animalsrom Antarctica, are: (^)
that procreate on the Brazilian coast;
migratoryriver, go to the sea and return to the salmons that are born in the
river to reproduce and die; migratory
birds from cold winter in tropicalregions that sp regions, etc.end the
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