Pseudogenes, non-functional copies of genes, are often considered 'junk DNA.' However, from an evolutionary perspective, they offer valuable insights. Which of the following BEST describes the significance of pseudogenes as evidence for evolution?
They demonstrate that mutations always lead to loss of function and contribute to genetic degradation.
They provide a reservoir of genetic material that can be readily reactivated to generate new functional genes.
Their presence indicates that organisms are actively evolving towards greater complexity.
They represent a record of past gene duplication events and subsequent loss of function, reflecting evolutionary history.
Related Questions
Which of the following is an atavistic character? I. Body hairs, II. Enlarged canines,ย III. Presence of six fingers,ย IV. Presence of tail in some babies.ย The correct combination is
I and IV
I and II
I and III
I, II and IV
Which of the following statements are incorrect.ย I. Microbial experiment shows that when the pre-existing advantagoeus mutations are selected they will result in the observation of new phenotypes. Over few generations, this would results in speciation,ย II. Neanderthal fossils represents a human relative,ย III. In 1938, a fish caught in South Africa happened to be a coelacanth (lobe fins) which was thought to be extinct. These animals evolved into the first living amphibian on both land and water,ย IV. Lichens can be used as water pollution indicators,ย V. Alfred Wallace, a naturalist, who worked in Malay Archepalago (present Indonesia) had also came to the similar conclusion on natural selection as reached by Darwin.ย The correct option is
I and III
II and IV
I, II and III
III, IV and V
Study of fossils is called
Organic evolution
Herpetology
Cytology
Paleontology
A study of fossils in different sedimentary layers indicates
Physiological period in which they existed
Geological period in which they existed
Conditions in which they were living
All of the above
Eye of Octopus and mammals appears quite similar. They are
Homologous organs
Analogous organs
Vestigial organs
None of these
Hybridized sterile (2n) plant can be converted into a fertile species by doubling the chromosomes through induced polyploidy. Such plants are called
Diploid
Tetraploids
Amphidiploids
Amphitetraploids
โUse and disuseโ theory was proposed by
Lamarck
Darwin
Hugo de Vries
Malthus
Example of convergent evolution is
Darwin finches and marsupial mouse
Placental wolf and Tasmanian wolf
Placental wolf and Darwin finches
Tasmanian wolf and marsupial mouse
If two species possess similar bone structures in their forelimbs despite having different functionalities, what can be inferred about their evolutionary history?
They evolved independently.
They experienced convergent evolution.
They adapted to similar environments.
They share a common ancestor.
Correct order is
Paleozoic Archeozoic Cenozoic
Archeozoic Paleozoic Proterozoic
Paleozoic Mesozoic Cenozoic
Mesozoic Archeozoic Proterozoic