NEET Biology Evolution : Multiple Choice Previous Years Questions MCQs 6

TL;DR

The video discusses the stepwise evolution of life on Earth, from the formation of simple molecules like water and ammonia, to the development of complex organic compounds such as proteins and nucleic acids.

Transcript

he'll open this video on eat evolution is brought to you by advanced Viacom normal fear from a question on the 26 I can define the correct sequence in which the following subscriptions has appeared during the course of evolution of life on earth glucose amino acids nucleic acids proteins ammonia amino acids proteins nucleic acids water a minor acid... Read More

Key Insights

• 💁 Formation of Earth involved stepwise processes, starting with the formation of simple molecules like water and ammonia.
• ❓ The development of complex organic molecules like proteins and nucleic acids occurred through a series of chemical reactions.
• 🐟 Gill slits in vertebrates support the theory of biogenesis and indicate the relationship between vertebrates and fish.
• 🦣 The Lamarckian concept of inheritance of acquired characters is not supported by examples like melanization of peppered moths in industrial areas.
• 🉐 The frequency of a character increases when it is adaptable and provides an advantage for survival.
• ⚾ The theory of natural selection is based on the idea of survival of the fittest and the selection of favorable variations.
• 💢 The correct order of geological eras is Precambrian, Paleozoic, Mesozoic, and Cenozoic.

Questions & Answers

Q: What were the first few molecules that formed during the creation of Earth?

Water and ammonia were the first few molecules formed during the formation of Earth.

Q: How did the formation of proteins differ from the formation of nucleic acids?

Proteins were formed by a collection of amino acids, while nucleic acids were formed by a combination of nitrogenous bases with sugars and phosphoric acid to form nucleotides, which then combine to form nucleic acids.

Q: How do gill slits in vertebrates support the theory of biogenesis?

Gill slits in embryos of all vertebrates, including fish, indicate the evolutionary relationship between vertebrates and fish and support the theory of biogenesis, which states that ontogeny recapitulates phylogeny.

Q: Which example does not support Lamarckian concept of inheritance of acquired characters?

Melanization of peppered moths in an industrial area does not support the Lamarckian concept as it is an example of natural selection rather than the inheritance of acquired characters.

Q: Why does the frequency of a character increase when it is adaptable?

Variations that are helpful in the adaptation of an organism to its surroundings are passed on to the next generation, increasing the frequency of the character over time.

Q: What is the theory of natural selection based on?

The theory of natural selection is based on the idea that nature selects the best traits for survival, with only the fittest organisms surviving and passing on their favorable variations to the next generation.

Q: What is the correct order of the geological eras?

The correct order is Precambrian, Paleozoic, Mesozoic, and Cenozoic.

Q: What is the Precambrian era further divided into?

The Precambrian era is further divided into three sub-eras: the Hadean, Archean, and Proterozoic eras.

Summary & Key Takeaways

• The formation of Earth involved the creation of simple molecules like water and ammonia, followed by other compounds like carbon dioxide and nitrogen.

• The next phase involved the formation of simple organic molecules, including glucose, amino acids, fatty acids, and nitrogenous bases.

• The third phase saw the development of complex organic molecules like polysaccharides, proteins, and nucleic acids.