unit test 1 Flashcards
why were the Galapagos islands of a particular interest to Darwin?
- Very few people had documented scientific findings from the Galapagos
- Species varied from island to island
- They contained few species but a high variation within populations of species
- They were volcanic islands that were found and easy to study
What mechanisms led to the speciation of Tiktaalik?
- Competition
- Variation
- Natural selection
What evidence supports the fact that tetrapods and fish are closely related?
- The embryos of modern fish and tetrapods look similar
- Both modern fish and tetrapods are vertebras
- The DNA of modern fish and tetrapods are similar
Monarch butterflies migrating to warmer climates in the fall to survive is an example of…
Behavioural adaptation
Over millions of years, the blowhole of the whale has moved from the tip of its nose to the top of its head. This is an example of…
Structural adaptation
What type of adaptation does the arctic fox use to avoid predation?
Camouflage
The male birds of paradise will do a fancy dance to attract a mate. What type of adaptation is this?
Behavioural
A strain of pneumonia is showing antibiotic resistance and is becoming more common each year. This is an example of…
Physiological adaptation & directional selection
Tiktaalik evolved from an aquatic species to a land dwelling species. This is an example of…
- Divergent evolution
- Adaptive radiation
- Natural selection
Baby birth weight has remained between 6-8 pounds for hundreds of years. This is an example of…
Stabilizing selection
What best explains the evolution of a long colourful tail in peacocks?
Sexual selection
The finches in the Galapagos islands have evolved over thousands of years to have different beaks specialized to collect foods in their environments. This is an example of…
- Divergent evolution
- Adaptive radiation
- Speciation
The migration of butterflies, birds and caribou is an example of a…
Behavioural adaptation
The elephant hawk moth will look like and behave like a snake in its larval stage to prevent predation. This is an example of
- Behavioural adaptation
- Structural adaptation
A population of sea stars are found in a range of sizes, from small, to large. Over time, however, the average size of the population shifts so that almost all sea stars in the population measure 12cm across. This is an example of…
Stabilizing selection
A population of flowers in a meadow shows multiple colours of petals, from very pale pink to darker pinks to very dark pinks. over time the population shifts and only very pink and very dark burgundy petals are seen. This is an example of…
Disruptive selection
A population of scorpions are known for its toxic sting and its medium to large pincers. Overtime the population is made up of only scorpions with very large pincers. This is an example of…
Directional selection
A group of Germans immigrated to the US to create a small colony. This colony shows much higher percentages of a gene that causes “polydactylism” than scientists find in other German populations. This would be an example of…
The founder effect
A natural disaster occurs killing the majority of a population of birds. Only a small population of birds remain. The birds that live, reproduce offspring with similar traits to the parents. This is an example of…
The bottleneck effect
What evidence best supports the theory of evolution?
- Palaeontology
- Embryology
- Comparative anatomy
- Molecular genetics
In 1775, a typhoon killed most humans in Pingelap. Those who remained carried a rare vision disorder. Today 10% of the population has this rare disorder. This is a result of a…
Bottleneck effect
Which 2 bones are found parallel in the forelimb of a frog, rat, and human?
Radius and ulna
