Evolution questions and answers for students. Evolution Class 12 Important Questions and Answers Biology Chapter 7 2022-10-25
Evolution questions and answers for students Rating:
Evolution is the process by which living organisms change and adapt over time. It is a fundamental concept in biology and is supported by a wealth of scientific evidence. While there is still much that scientists do not understand about evolution, there are some key questions and answers that can help students better understand this complex and fascinating process.
What is evolution?
Evolution is the process by which living organisms change and adapt over time. It is a natural process that has been occurring for billions of years and is responsible for the diversity of life we see on Earth today. Evolution occurs through the process of natural selection, which is the idea that certain traits are passed down from one generation to the next because they are advantageous in a particular environment.
How does evolution occur?
Evolution occurs through the process of natural selection. In natural selection, certain traits are passed down from one generation to the next because they are advantageous in a particular environment. For example, if a group of animals lives in a very cold environment, those that are able to grow thick fur will be more likely to survive and reproduce than those that do not. Over time, the trait of thick fur will become more common in the population because it helps the animals survive and reproduce.
Is evolution a theory or a fact?
Evolution is a scientific theory, which means that it is a well-supported explanation for a phenomenon that has been observed in the natural world. It is not a fact, but it is supported by a vast amount of scientific evidence from many different fields of study, including paleontology, genetics, and anthropology.
What is the evidence for evolution?
There is a wide range of evidence for evolution, including the fossil record, which shows the existence of extinct species that are now known only through their fossilized remains. There is also genetic evidence, which shows that different species share common ancestors and have evolved from common ancestors through the process of natural selection. Other evidence includes the existence of vestigial organs and structures, which are structures that have no function in an organism but are thought to be remnants of structures that were once useful in its ancestors.
Is evolution a random process?
While evolution is not a completely random process, it does involve some element of chance. Natural selection is not a conscious process and does not have a specific goal in mind. Instead, it is driven by the environment and the survival and reproduction of organisms that are better suited to that environment. Some traits may be advantageous in one environment but not in another, and the process of evolution does not always result in the most "perfect" or "advanced" organism.
Does evolution contradict religious beliefs?
Many religious beliefs do not contradict the concept of evolution. Some religious traditions see the natural world as a reflection of the divine and view evolution as a way in which God has created and shaped the diversity of life on Earth. Others view evolution as a natural process that is consistent with the idea of a divine creator. However, some religious beliefs do contradict the concept of evolution, and there can be conflicts between scientific and religious perspectives on the origin and development of life.
In conclusion, evolution is a complex and fascinating process that is responsible for the diversity of life we see on Earth today. While there is still much that scientists do not understand about evolution, there are some key questions and answers that can help students better understand this process and how it has shaped the natural world.
Questions to Ask Your Biology Teacher About Evolution
Name the type of evolution your example depicts and state why is it so named? The gene pool total genes and their alleles in a population remains constant. Modem day frogs and salamanders have evolved from them. When two or more species belonging to different ancestors develop similar characteristics due to adaptation to a particular environment, it is known as convergent Also read: Q. How can one species "turn into" another? White-winged moths fail to camouflage and thus, decreased in number, whereas dark-winged moths were able to escape predation. How many millions of years elapsed between the first male and first female? They buried their dead.
Answers to Student’s Questions about Evolution and Intelligent Design
These have similar basic plan and origin. How We Know 1. All India 2014 Answer: When two species have structures that are similar in function but differ in origin and anatomy, they are called analogous structures. Answer: Francesco Redi, Spallanzani, and Louis Pasteur iii Who experimentally proved that life develops from pre-existing life only? For example, wings of butterfly and birds. Another counterpoint to this anti-evolution statement is he is reaching when he claims "all major animal groups appear together" during the Cambrian Explosion.
Evolution Trivia Questions and Answers (Multiple Choice Question) 2023
Which type of selection is industrial melanism observed in moth, Biston betularia? Which evolved first, male or female? It can cause mutation in DNA and can degrade proteins and enzymes on reactions, hence, toxic to aerobic life forms. CBSE Outside Delhi 2016 Answer: Homo habilis was carnivorous. After 18 days, a significant amount of simple major organic compounds, such as amino acids, such as glycine, alanine, and aspartic acid, and peptide chains, began to appear. What does he consider a "major animal group"? List the two main propositions of Oparin and Haldane. How would the gene flow or genetic drift affect the population in which either of them happens to take place? What would I do without them besides have free time, lower blood pressure, and a more positive view of humanity in general? Organisms in each continent evolved along different lines hence emergenece of new species. They observed the formation of amino acids.
Molecular biology tells us that some bacteria have molecular mechanisms by which they can survive antibiotics. In that background, white-winged moths survived but dark moths were picked out by predators. It is seen in sexually reproducing organisms which occurs as a result of crossing over during meiosis or fusion of gametes. How long does evolution take? The age of the rock is known as the absolute age. Given below is a diagrammatic representation of the experimental setup used by SL Miller for his experiment. Evolution resulted from variations.
Evolution Class 12 Important Extra Questions Biology Chapter 7
According to Hugo de Vries what is saltation? In all Pakistan NTS organizes Biology Solved MCQs For Medical Jobs Objective type biology general knowledge MCQs for exams preparations tests. The age of a fossil is determined by carbon dating. The theory of spontaneous generation stated that A. Equivalently, we can say that the a allele is now rare, and therefore experiences positive selection - an increase in a is the same as a decrease in A. It occurs during meiosis.
Important Biology Questions and Answers for Chapter
Appearnace of antibiotic-resistant bacteria is an example of A. State a reason for the increased population of dark coloured moths coinciding with the loss of lichens on tree bark during industrialisation period in England. Delhi 2011C Answer: The theory of biogenesis was proposed by Oparin and Haldane. Explain giving three reasons. Delhi 2014C Answer: Convergent evolution has resulted in the development of structures like wings of butterfly and birds. Write the significance of vestigial organs.
Since the origin of life on earth, there were five episodes of mass extinction of species. The bones of forelimbs of whale, bat, cheeah and man are similar in structure, because A. For example, flying insects, birds and other flying species have all evolved the ability to fly, but independently of each other. Favourable characteristics enable the organism possessing them to compete better in the struggle for existence. Delhi 2011 Answer: Hugo de Vries explained that new species arise from pre-existing ones in a single generation by a sudden appearance of marked differences called mutations. Answer: The members of a species that resemble structurally and functionally are able to interbreed freely and produce fertile offspring of their own kind and share a common gene pool. Describe the three different ways by which natural selection can affect the frequency of a heritable trait in a population.
How is convergent evolution different from divergent evolution? In the same way, the frequency for aa is q² and for Aa it is 2 pq. According to this theory, new species arise suddenly showing abrupt deviations in characters from the normal forms. All India 2017 Answer: Oparin and Haldane proposed the following postulates with reference to origin of life. There are many However, it does illustrate that mutations can lead to new structures or behaviors that could ultimately contribute to evolution. Sharma was teaching the topic Lamarckism. All India 2016 Answer: i Refer to Answer No.
Bottleneck effect Question 15. But like reptiles, it has a long tail, jaws full of teeth, claws on forefingers, and keelless sternum. Individual bacteria differ from one another. Now, the genetic diversity of the surviving population becomes the genetic diversity of the entire population. Isolation: By selecting the most suitable genotypes, natural selection guides different populations into different adaptive channels. Homo erectus They probably ate meat.
Or State the two principal outcomes of the experiments conducted by Louis Pasteur on the origin of life. It was the size of a crow. The study of fossils reveals the type of life forms occurring in the past and highlights the course of evolution of living organisms. Delhi 2012 Or State the views of Oparin and Haldane on evolution. UV rays and lightning. Which law states that the sum of allelic frequencies in a population is constant? Adaptive radiation is the process in which a living organism diversifies from a single ancestor into multiple new forms. All India 2011C Answer: Divergent evolution is a process, where the same structure develops along different directions in different organisms due to adaptations to different needs.