Two requirements for natural selection are?
fitness and adaptation
heritability and fitness
heritability and variation ( I chose this )
fitness and variation
Which of the following best describes evolution by natural selection as we now understand it?
Survival of the fittest
Only the smartest and strongest survive
Change in the frequency of traits over time ( I chose this)
Random changes in traits over time
If we cut the tail off a mouse, then breed it with a normal mouse with a full tail, we would expect?
All the offspring will have no tails
None of these answers are correct
Half of the offspring will have tails, the other half will not
All the offspring will have tails ( i chose this)
Natural selection will increase the frequency of a trait in a population if that trait?
is maladaptive
is highly fit
increases organisms' chances of survival only
increases organisms' chances of survival and reproduction ( I chose this)
2007-12-12 04:16:31 · 2 answers · asked by jeniferrrr 1 in Science & Mathematics ➔ Biology
Natural selection is evolution.
True ( I chose this)
False
2007-12-12 04:17:08 · update #1
Which of the following best describes evolution by natural selection as we now understand it?
Survival of the fittest
Only the smartest and strongest survive
Change in the frequency of traits over time ( I chose this)
Random changes in traits over time
This is the incorrect answer.
You chose the definition of evolution. You need to understand the difference between evolution and the theory of Evolution by Natural Selection. Evolution (change in allele frequency in a population over time) is a phenomenon that is explained by the theory of Evolution by Natural Selection.
Given the choices, Survival of the fittest is the best answer. There is a healthy dose of chance to survival. Just because you have a cool set of genes that give you a lot of advantages doesn't mean that you'll get to pass then down. Random changes in traits provides the raw materials for evolution but it does not explain why certain genes change in frequence.
2007-12-12 17:49:51 · answer #1 · answered by Nimrod 5 · 0⤊ 0⤋
Natural selection is _not_ evolution - it's the process that drives evolution.
2007-12-12 04:22:16 · answer #2 · answered by John R 7 · 0⤊ 0⤋