BIOLOGICAL EVOLUTION Flashcards
(14 cards)
Evolution by natural selection would have started when _______________
Cellular forms of life with differences in metabolic capability originated on earth.
The rate of appearcance of new forms is linked to ____________
life cycle or life span
Fitness is based on ______________
characteristics which are inherited
Adaptive ability has a genetic basis
True/false
True
Fitness is the end result of __________
ability to adapt and get selected by nature
What are the 2 key concepts of Darwinian Theory of evolution
Branching descent
Natural selection
Before/After Darwin, a French naturalist Lamarck said that evolution of life forms had occurred but driven by ____________
Before
use and disuse of organs
Which animal did Lamarck use as an example for his theory
Giraffes’ long neck - forage leaves on tall trees
Is Lamarck’s conjecture still accepted ?
No
We are still not sure whether to regard evolution and natural selection as processes or end result of unknown processes.
True/false
True
It is possible that the work of ____________ influenced Darwin
Thomas Malthus
No two individuals are alike
True/false
True
Population size will grow ____________ if everybody reproduced maximally but the population sizes are ________ in reality which means that _____________
exponentially, limited , there had been competition for resources
What was the brilliant insight of Darwin ?
He asserted that variations, which are heritable and which make resource utilisation better for few( adapted to habitat and better) will enable only those to reproduce and leave more progeny.
