What is Darwinian fitness?
What is Darwinian fitness?
Populations evolve to maximise their reproductive fitness in the habitat in which they live.
- Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategy.
$\rightarrow$ Some organisms breed only once in their life time(pacific salmon fish, bamboo).
$\Rightarrow \quad$ Some reproduces many times during their life time(most birds and mammals)
$\rightarrow$ Some organisms produce a large number of small sized offspring (oyster, pelagic fishes)
$\Rightarrow$ Some organisms produce small number of large sized offspring (birds, mammals)
Life history traits of organisms have evolved in relation to the constraints imposed by the biotic and abiotic components of the habitat in which they live.
Similar Questions
Species are considered as
Species are considered as
- [AIPMT 2003]
Salinity of the soil is often caused due to
Salinity of the soil is often caused due to
Plants growing on sand and gravel are called
Plants growing on sand and gravel are called
Select the correct match
$(I)$
$(II)$
$(III)$
$(a)$ $+$
$(i)$ $-$
$(P)$ Amensalism
$(b)$ $-$
$(ii)$ $-$
$(Q)$ Commensalism
$(c)$ $-$
$(iii)$ $0$
$(R)$ Predation
$(d)$ $+$
$(iv)$ $0$
$(S)$ Competition
Select the correct match
| $(I)$ | $(II)$ | $(III)$ |
| $(a)$ $+$ | $(i)$ $-$ | $(P)$ Amensalism |
| $(b)$ $-$ | $(ii)$ $-$ | $(Q)$ Commensalism |
| $(c)$ $-$ | $(iii)$ $0$ | $(R)$ Predation |
| $(d)$ $+$ | $(iv)$ $0$ | $(S)$ Competition |
- [AIIMS 2019]