The change in the frequency of an existing gene variant in a population due to random sampling of organisms is known as:
1. | Saltation | 2. | Adaptive radiation |
3. | Genetic drift | 4. | Gene flow |
All the following are true regarding Homo erectus except:
1. Fossils were discovered in Java
2. Lived around 2.5 mya
3. Had a brain capacity of about 900 cc
4. Probably ate meat
A chemical experiment that simulated the conditions thought at the time to be present on the early Earth and tested the chemical origin of life under those conditions was performed by:
1. | Georges Cuvier | 2. | Francesco Redi |
3. | Alfred Russell Wallace | 4. | Stanley Miller |
The wings of bats and birds are:
1. | convergent functionally but not anatomically |
2. | convergent both functionally and anatomically |
3. | convergent neither functionally nor anatomically |
4. | divergent functionally and anatomically |
Allele and genotype frequencies in a population will remain constant from generation to generation in the absence of all the following evolutionary influences, except:
1. | Random mating | 2. | Mutations |
3. | Natural selection | 4. | Gene flow |
Speciation that occurs when biological populations of the same species become isolated from each other to an extent that prevents or interferes with gene flow is called as:
1. | parapatric speciation | 2. | cladogenesis |
3. | allopatric speciation | 4. | anagenesis |
Biochemical evidence for evolution assumes that the more recently two species shared a common ancestor, the more alike their:
I: | stained chromosome bands. |
II: | DNA sequences. |
III: | protein sequences. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II, and III |
What causes the ‘struggle for existence?
1. | overproduction and imbalance with available resources |
2. | innate competitive tendencies |
3. | the decrease in the environmental carrying capacity |
4. | territories and dominance hierarchies |
Which of the following is not a finding observed by Darwin, when he landed on the Galapagos Islands?
1. | Woodpeckers were absent on the islands |
2. | The island species resembled the mainland species |
3. | Islands contain more different species of finches than the mainland |
4. | The corresponding size of the species was smaller on the islands than the species on the mainland |
According to the Darwinian concept of evolution, a giraffe has a long neck because:
1. | it was always like that since the beginning |
2. | during evolution the number of cervical vertebrae got increased |
3. | its ancestors stretched their necks to get food |
4. | ancestral giraffes with longer necks got more food and left more surviving offspring |