Isolation refers to the division of a species’ population into smaller units, where organisms in these subunits are hindered from interbreeding by barriers known as isolating mechanisms. Different type of reproductive isolation are as follows: I. Geographical Isolation: • Physical barriers like rivers, oceans, mountains, or glaciers divide the original population. • Organisms can’t cross these … Read more
The four major factors that are responsible for changing gene frequency are as follows: 1. Gene mutations :induce hereditary alterations either in a solitary gene or across an entire chromosome. 2. Natural selection:instigates modifications in the gene frequency within a population, subsequently fostering evolutionary changes over time. 3. Migration :engenders the relocation of populations, facilitating … Read more
Genetic drift is the random alteration of gene frequencies in a population due to chance, particularly prominent in small populations. 1. Founder effect occurs when a portion of the population, isolated or migrated, develops genetic distinctions from the original due to allelic frequency changes, potentially leading to the emergence of a new species. 2. The … Read more
Australopithecus is characterized as having a brain resembling that of an ape.
The Mesozoic era’s Jurassic period is recognized as the age dominated by reptiles.
1. Coacervates, sizable colloidal particles, precipitate in water and are considered the initial pre-cells. 2. These structures are proposed to undergo a gradual transformation leading to the emergence of living cells in the theory of chemical evolution.
“Homo sapiens denotes the scientific classification for contemporary human beings.”
These are organs that were once functional but have diminished in their functionality due to evolutionary changes.
Homologous organs exhibit a similar structure or embryonic origin but serve different functions in diverse organisms, offering compelling support for the theory of evolution.
1. The Hardy-Weinberg equilibrium asserts that genetic variation stays constant in a population under random mating and no disruptive factors, predicting stable genotype and allele frequencies. 2. However, natural forces like mutations, selection, nonrandom mating, genetic drift, and gene flow often disturb this equilibrium, making it more of an idealized concept than a practical reality … Read more