Oparin-Haldane hypothesis

Q: What types of organisms can produce their own food required to survive? A. Organisms that can do…

A: An organism is any individual that embodies the properties of life. It is a term for "life form".…

Q: How do archaea and bacteria differ? A. Archaea can live in environments with extreme conditions such…

A: Introduction Archaea Is A Group Of Early Prokaryotes That Form A Unique Domain From Bacteria And…

Q: Which statement describes all prokaryotic and eukaryotic cells? A. Ribosomes are present in the…

A: Cell is a structural and functional unit of living organisms. Several cells joined together to form…

Q: Which analogy most closely represents the number of cells in an average - sized adult human? A. The…

A: An analogy is a method of explanation of a complex reality by comparing it to something more easy to…

Q: What is different between RNA and DNA? a. Only rna has adenine b. Only dna forms hydrogen bonds…

A: Deoxyribonucleic acid, also generally known as DNA, is defined as a complex molecule that contains…

Q: Free radical has been highly linked to cancer because it damages? A. DNA B. Mitochondria C. Cell…

A: Free radicals are unstable atoms that can cause cell damage, resulting in illness and aging. Free…

Q: What must occur before amino acids can be used for metabolic pathways other than protein synthesis?…

A: Amino acids should be deaminated before entering into the other metabolic pathways so as to convert…

Q: Which statement about DNA is FALSE? A. DNA is present in and essential for all living cells. B. DNA…

A: Introduction :- Humans and nearly all other species carry their genetic information in DNA, also…

Q: Whose discovery made the dating of ancient materials possible?

A: Radiocarbon dating works by comparing the three different isotopes of carbon. Isotopes of a…

Q: How is artificial selection different from Darwin's idea of natural selection?

A: The theory of natural selection was explored by 19th-century naturalist Charles Darwin.

Q: Give two reasons why the evolution of multicellularity was important. Edit View הזחן

A: Evolution is the process by which simple character Is converted into complex ones .

Q: What event is thought to have contributed to the evolution of eukaryotes? a. global warming b.…

A: Eukaryotes can be defined as organisms that comprise of eukaryotic which includes the protists,…

Q: Which of the following events occurred earliest in Earth’s history? a. Membrane-enclosed structures…

A: Recognizable human beings appeared on a geological scale at most 2 million years ago, a vanishingly…

Q: What is examined to do relative dating? O A. Layers of sediment O B. Uranium deposits O c. Carbon-14…

A: Answer- Relative dating is the process by which layers of sediments including fossils are studied to…

Q: Which of the following did Stanley miller place in the experimental system to show that organic…

A: Stanley Miller and Harold Urey's experiments reported evidence of chemical evolution or Chemogeny.…

Q: While how the first cells formed is still unknown, scientists suspect that the first active…

A: Biological macromolecules are those molecules that are monomers ( Nucleic acids, lipids,…

Q: Describe how scientists have tested the hypothesis that simpleorganic molecules could have formed on…

A: There are fossils that were discovered from Western Australia 3.5 million years ago (mya). This…

Q: what simple organic molecules were likely the precursors of life? a. water and proteins b. amino…

A: The two important aspects of life are its origin and evolution. The branch of life science, which…

Q: Name three ways that humans have affected life on Earth.?

A: humans have affected the earth environment in many ways. The three Major problems are  1-pollution…

Q: How would the appearance of protocells have represented a key step in the origin of life?

A: Introduction  Origin of life on earth can be traced back to 3.4 billion years ago and as we now know…

Q: The early atmosphere lacked which gas? 1. carbon dioxide 2. oxygen 3. amonia 4. nitrogen

A: The early atmosphere was likely to contain a lot of carbon dioxide and water vapor because it was…

Q: What is the main difference between prokaryotic and eukaryotic cells? A. The size of the cells B.…

A: Cells are the basic unit of survival.

Q: What were the results of the isotope analysis that was done on this woman’s teeth?   A. The iron…

A: The results of isotope analysis on a woman's teeth can give important insights into her geographic…

Q: Who discovered the molecular structure of DNA?

A: Gregor Mendel is renowned as a father of genetics. He conducted several genetic experiments on pea…

Q: According to the land bridge theory, why may people have crossed into North America from Siberia?

A: Landbridge theory, states that early animals and people traveled from Siberia to Alaska across a…

Q: What do DNA and proteins have to do with each other

A: DNA is deoxyribonucleic acid. DNA contains genetic information.  Proteins are made up of amino…

Q: How is sediment used for dating? O A. The newest layer is most radioactive. O B. The newest layer is…

A: Fossils are the evidences for the history of the life on earth, the remains of a organism or any…

Q: What is Binomial Nomenclature?   a. Family and Kingdom b. The Genus and Species names c. Kingdom and…

A: Binomial nomenclature is a widespread used international order for naming organisms in two parts,…

Q: Which scientists figured out DNA is a double, not a triple helix?    1. Franklin and Wilkins   2.…

A: DNA is deoxyribonucleic acid is genetic hereditary material that is found in all the organism . It…

Q: What is the role of the nucleolus?   A. produce DNA   B. produce lipids…

A: Solution :- Nucleolus  Is a structure in the nucleus and is primarily responsible for creating…

Q: Describe what the early atmosphere was like and what cause a large amount of oxygen (O2) to build up…

A: Early atmosphere  Around 4.6 billion years ago, the Earth was formed from a heated mixture of gases…

Q: Which is NOT a difference between prokaryotic and eukaryotic cells?   a. Eukaryotes have a plasma…

A: Introduction :- Eukaryotes are a type of cell that make up all multicellular organisms (plants,…

Q: You have observed worms in rotten meat. You are interested of studying the origin of worms in the…

A: As late as the 17th century, some biologists thought that some simpler forms of life were generated…

Q: The nucleotide sequence in a single strand of DNA represents which level of structure? a.…

A: Deoxyribonucleic acid (DNA) stores the cell’s genetic information and is present in the nucleus of…

Q: How the early man could easily preceive the ddiffernce between inanimate matter and living…

A: When we try to define living, we conventionally look for distinctive characteristics exhibited by…

Q: If there were to be an abrupt change in the climate system, what would be the effect on human…

A: Climate change refers to long-term shifts in temperatures and weather patterns or the change in the…

Q: The first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes…

A: A) single celled plants

Q: Can you answer all the parts of this question about this picture  A:What class does this organism…

A: Mollusk, also spelled mollusc, is a soft-bodied invertebrate belonging to the phylum Mollusca that…

Q: Scientists think that terrestrial life probably originated in Earth's oceans because Choose one:…

A: Question - Scientists think that terrestrial life probably originated in Earth's oceans because…

Q: What does it mean that cells specialize? A. cells all have the same functions but different…

A: Cell specialization, also known as cell differentiation, is the transformation of cells into…

Q: How are cancer cells different from normal human cells? A. They lack a nucleus B. They have a cell…

A: Cancer is defined as a group of diseases characterized by the uncontrolled growth and spread of…

Q: What's the largest unit of geologic time, lasting hundreds of millions of years? A. Era B. Eon C.…

A: INTRODUCTION Largest unit of geolic time lasting hunderds of millions of year are Eons.

Q: Which is not true of RNA?   a. It is usually single-stranded. b. It functions in the cytoplasm.…

A: RNA (ribonucleic acid) is a polymeric molecule that acts in many biological processes such as…

Q: Because it's most resistant to deterioration, which type of molecule is most often found in…

A: Fossils are dead plants and animals that have been preserved in sedimentary rock or other crust…

Q: Which theory of aging states that unstable oxygen molecules tend to steal electrons as they bounce…

A: The unstable oxygen molecules have higher energy and can damage the biomolecules.

Microbes

Microbes are microscopic living organisms that can only be detected with the help of specialized laboratory equipment called a microscope. These living organisms are so small that they are not visible to the naked eye.