LIFE SCI
IEB syllab
by Jord
Strand 1: Environm
Population and
Strand 2: Life Processes in anima
Human endocrine system
Reproduction in plants
Reproductive animal strategi
Human reproduction
, ENVIRONME
POPULAT
COMMUNIT
→ Individual:a single organism that forms part of
→ Ecology: study of interactions of organisms with
→ Population: an interbreeding group of individua
area and produce fertile offspring.
→ Community: the assemblage of interacting pop
→ Ecosystem: comprised of 1 or more communitie
→ Environment: the external factors, living (biotic
and influencing its development and survival.
→ Habitat: the specific environment (home) in wh
→ Population size: total number of individuals in a
→ Population density: number of individuals per u
FACTORS THAT AFFECT FUTUR
Immigration (into
organisms in
+
, ENVIRONMEN
POPULAT
COMMUNIT
Mark and reca
𝒎 𝒙 𝒔
P=
𝒕
→
→ P = estimated population size. co
→ m = total number of animals captured and
marked in 1st sample.
→ s = total number of animals captured in the
2nd sample.
→ t = number of marked individuals in the 2nd
sample.
→ The estimate obtained from the mark &
recapture methods can be made more
accurate by repeating the sampling a few
IEB syllab
by Jord
Strand 1: Environm
Population and
Strand 2: Life Processes in anima
Human endocrine system
Reproduction in plants
Reproductive animal strategi
Human reproduction
, ENVIRONME
POPULAT
COMMUNIT
→ Individual:a single organism that forms part of
→ Ecology: study of interactions of organisms with
→ Population: an interbreeding group of individua
area and produce fertile offspring.
→ Community: the assemblage of interacting pop
→ Ecosystem: comprised of 1 or more communitie
→ Environment: the external factors, living (biotic
and influencing its development and survival.
→ Habitat: the specific environment (home) in wh
→ Population size: total number of individuals in a
→ Population density: number of individuals per u
FACTORS THAT AFFECT FUTUR
Immigration (into
organisms in
+
, ENVIRONMEN
POPULAT
COMMUNIT
Mark and reca
𝒎 𝒙 𝒔
P=
𝒕
→
→ P = estimated population size. co
→ m = total number of animals captured and
marked in 1st sample.
→ s = total number of animals captured in the
2nd sample.
→ t = number of marked individuals in the 2nd
sample.
→ The estimate obtained from the mark &
recapture methods can be made more
accurate by repeating the sampling a few
