Heart
What is a characteristic belonging to a population or organism?
- Trait
- Mutation
- Gene
Trait
True or False: organisms choose when they want to mutate
False. It is random
True or False: Natural Selection is when humans choose the traits of an organism.
False. Artificial selection is when humans choose the traits of an organism
True or False. It is ethical (good) and possible to breed "better" human beings using artificial selection and controlling who is allowed to have children.
False.
That idea is called eugenics, it ignores that humans have very complex genes and that all humans lives have the same inherent value.
People and governments have tried this idea in the past. It leads to cruelty and crimes against human like the holocaust.
What is the process of organisms changing over time. Organisms with traits better suited to their environment tend to survive and reproduce?
-mutation
-variation
-natural selection
natural selection
Organism inherit _______ that determine their traits
genes
Name one example of artificial selection
Domestication of wolves into dogs, breeding corn to have more kernels etc.
True or False, natural selection in mammals can happen over night
False. Natural selection takes many generation and mammals do not breed fast enough for this to happen
What is a random change in DNA
- artificial selection
- mutation
-gene
mutation
Organisms that are better able to survive are more likely to ____________________ and pass on their traits.
reproduce
Who was the scientist who is famous for his work on natural selection?
-Isaac Newton
- Charles Darwin
-Enrico Fermi
Charles Darwin
What happened to finches on the Galapagos Islands that were isolated on different islands with different types of food
The population changed and they evolved different beaks
What is the process in which humans choose specific traits they want and breed organisms together for those specific traits?
-artificial selection
- Genetic material
- Natural selection
artificial selection
Which off these is most likely to cause a mutation:
- oversleeping
-too much sun exposure
- cold weather
-too much sun exposure. the ultraviolet light causes changes in an organisms DNA
Biologist
Explain how the pocket mouse population shifted from having more light-colored mice to more dark-colored mice.
pocket mice lived on dark rocks. Mice with darker fur were harder to see by predators, which meant they survived more and were able to reproduce and pass this trait on.
____________________ is a difference in the same trait within a population
-gene
-variation
-mutation
-variation
Name one way an animal's traits could help them survive in nature?
Camouflage, being taller to reach food, being faster to out run predators
Differences in traits can occur from both _______ and environmental factors.
Genetic
How does an organism's ability to survive and reproduce can affect the entire population.
Organisms who survive pass on their traits to their offspring, which passes on any advantage in surviving to their offspring, which means they in turn can pass on that trait. Eventually it can spread throughout the entire species