Evolution practice · Easy

Option B is correct because Darwin's theory of natural selection emphasizes continuous variations, not discontinuous variations.

Option C (Louis Pasteur) is correct because Louis Pasteur disproved spontaneous generation and demonstrated that life arises from pre-existing life.

Option B (Genetic drift rarely involves competition between the members of a species) is correct because genetic drift is a random process, while natural selection involves competition.

Option C (Feed upon available nutrients in the environment) is correct because heterotrophs obtain nutrients from their surroundings.

Option A (Convergent evolution) is correct because analogous organs arise from different ancestors adapting to similar environments.

Option C (Ocean) is correct because the first cell-like structures are believed to have originated in the ocean due to the presence of water and dissolved minerals.

Option C (Adaptive radiation leads to evolution) is correct because adaptive radiation, the diversification of a species into new forms, is a direct driver of evolutionary change.

Option D is correct because Homo erectus is known to be the first human ancestor to use fire.

Option A is correct because coacervates are protobionts composed of polysaccharides, proteins, and water, representing a step towards the origin of life.

Option A (Male peacocks evolve tail and feathers that makes them more vulnerable to predators) is correct because it seems counterintuitive to natural selection, which typically favors traits that increase survival and reproduction.

Option D (Vermiform appendix, ear muscles and coccyx) is correct because these structures are reduced or non-functional in humans, representing vestigial organs.

Option A (Fossils) is correct because fossils provide direct evidence of past life forms and their evolutionary changes over time.

Option A is correct. The assertion and reason are both true, and the excessive use of herbicides (anthropogenic action) directly leads to the selection of herbicide-resistant varieties in a shorter time frame.

Option B (Divergent evolution) is correct because divergent evolution describes the process where similar structures in related organisms evolve to have different functions due to adaptation to different environments.

Option C is correct because Neopilina is considered a connecting link between Annelida and Mollusca, exhibiting characteristics of both phyla.

Option C (Natural selection) is correct because Darwin's theory emphasizes that differences between species arise primarily through natural selection.

Option C (A I Oparin) is correct because A.I. Oparin is known for his pioneering work on the origin of life, proposing the theory of chemical evolution and the formation of coacervates.

Option B is correct because Darwin's finches are a classic example of adaptive radiation driven by geographical isolation.

Option D (All of the above) is correct because the Australopithecus skull differs from the modern human skull in age, shape, and size.

Option A (Macro-evolution) is correct because macro-evolution focuses on the formation of new taxonomic groups above the species level.

Option A (Palaeobotany) is correct because palaeobotany, the study of fossil plants, is the branch of biology that helps in understanding the origin and existence of coal, which is formed from ancient plant matter.

Option C (0.8) is correct because in Hardy-Weinberg equilibrium, p + q = 1, where p is the frequency of allele A and q is the frequency of allele a. If p = 0.2, then q = 1 - 0.2 = 0.8.

Option D is correct because the present concept of evolution incorporates Neo-Darwinism, the Synthetic theory, and is considered the Modern concept of evolution.

Option D (Meat was not spoiled, when heated and kept sealed in a vessel) is correct because it supports the idea that life does not spontaneously generate from non-living matter if precautions are taken to prevent contamination.

Option C (Devonian) is correct because lung fishes, air-breathing animals, and corals predominated during the Devonian period.

Option B is correct because Darwin's finches are a group of bird species found on the Galapagos Islands that exhibit adaptive radiation.

Option D (Arms shorter than legs) is correct because this is a key anatomical difference between modern humans and apes.

Option B (Protovirus) is correct because the protovirus theory suggests that the first life forms were similar to viruses, consisting of nucleic acids and proteins but lacking cellular structures.

Option A (Saltation) is correct because saltation refers to sudden, large-scale mutations leading to speciation, which aligns with de Vries' belief.

Option A is correct because Charles Darwin used the HMS Beagle for his famous voyage.