4.6 billion years
What is the age of earth?
Created the theory of evolution and the process or natural selection.
Who is Charles Darwin?
1. All living things share a common ancestor
2. Species on earth evolved through natural processes
What are two very important claims Charles Da...
NATS Unit 1 Exam
4.6 billion years correct answerWhat is the age of earth?
Created the theory of evolution and the process or natural selection. correct answerWho is Charles Darwin?
1. All living things share a common ancestor
2. Species on earth evolved through natural processes correct answerWhat are two very important claims Charles Darwin made?
Because they can only increase or decrease genes that are already in the population correct answerWhy does natural selection require that populations be variable?
No, because there would be no variation of population which is required for natural selection correct answerCan natural selection act on a population of clones?
Beneficial traits continue to be selected for through time as long as it is still useful for the organism correct answerWhat happens to the frequency of a beneficial trait in a population through time? Why?
Bad traits are selected against and ideally eliminated - if it is not useful it won't be reproduced correct answerWhat happens to the frequency of a bad trait in a population through time? Why?
It remains the same correct answerWhat happens to the frequency of a trait that is neither beneficial nor detrimental in a population through time? Why?
Resources are limited so organisms that have beneficial traits tend to survive longer and leave more off spring correct answerWhy do organisms with beneficial traits leave more offspring?
Speed, smell, sight, color correct answerWhat are some examples of beneficial traits? It shows evolution through the temporal succession of life. Starting with simple forms -> inter vertebrates -> vertebrates. Starting in oceans -> transitioning to land correct answerIn what ways does the fossil record show evidence for evolution?
Fossils that show major groups of animals. Ex: Whales correct answerWhat are transitional fossils? Give some examples
Vertebrates that look very different as adults, but look very similar as embryos- We can see vestigal reminders in certain species. correct answerWhat is embryology? How does embryology show evidence for evolution?
Life is not spread uniformly across the oceans and earth. Species are spread across the globe with regards to their genetic relationships with one another. Where things live reflect where they evolve!
Exception: Birds and Fish! correct answerHow does biogeography show evidence for evolution? What organisms are exceptions to this? Why?
Similar DNA sequences correct answerHow does genetics show evidence for evolution?
All organisms have the same genetic code. correct answerWhy is genetic engineering possible?
Genes that have been maintained throughout evolution. It shows because we share ~500 immortal genes with all other living things. correct answerWhat are 'immortal genes'? How do they show evidence for evolution?
A basic property of biological systems.
Organism:
Ecosystem:
Regional: correct answerWhat does interconnectedness refer to on an organism-level, an ecosystem-
level, and a regional-level?
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