Why do scientists think that the increased availability of oxygen in the atmosphere was an O important contributing factor to the Cambrian Explosion? Increased oxygen in the atmosphere allowed more efficient ATP generation, making it easier to support a larger and more complex body Increased oxygen in the atmosphere made life on land possible Oxygen is a mutagen that increases the rate of evolution Increased oxygen in the atmosphere triggered many organisms to stop undergoing photosynthesis

Q: When did photosynthetic organisms first appeared? O From the very beginning of life, they are some…

A: Photosynthetic creatures, also called photoautotrophs, are photosynthesis-capable organisms. Higher…

Q: The ancestral protist common ancestor of all animals lived approximately million years ago. 800 600…

A:

Q: What triggered the Cambrian explosion that started 541 million years ago? All of the above O Higher…

A: Cambrian explosion refers to an event that occurred in the Cambrian period about 541 million years…

Q: What is a transitional fossil? Transitional fossils were poorly adapted to their environments. O…

A: Introduction - Any preserved remains, impression, or trace of any once-living thing from a previous…

Q: T/F Glycolysis evolved very early, before there was oxygen on earth

A: Glycolysis evolved very early, before there was oxygen on earth. This is TRUE. Because of the…

Q: The diagram above represents stages in embryonic development of suggest that these organisms - O…

A: While studying the embryonic development of various animals, it was observed that at early stages it…

Q: Which of the following illustrates the unity observed in organisms with a common ancestor? Flamingos…

A: Common ancestors or common descents can be defined as the factor in which one organism is related to…

Q: Which is one a force of evolution? Deletion Natural Selection Photosynthesis Electrophoresis It is…

A:

Q: In the geologic time scale, there is a large delay between the evolution of photosynthetic bacteria…

A: Option (A) is correct option . The evolution  of photosynthetic bacteria occured 3.4 billion years…

Q: Direct evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion…

A: The earliest life structures we are aware of were minuscule organic entities (microorganisms) that…

Q: Which of the following statements is correct about index fossils? O a. They are a group of…

A: 1. B. They are the fassil remains of an organism that lived in a particular geologic age, used to…

Q: The Precambrian (before Cambrian) time period includes many eons. This period of time includes the…

A: Answer. The Precambrian (before Cambrian) time period includes many eons. This period includes the…

Q: No one knows exactly when or how the first living organisms evolved, but we know that life existed…

A: Just as the universe is believed to have been formed due to the occurrence of the 'Big Bang', the…

Q: Which statement best explains the evolutionary relationship of birds and butterflies? Bird and…

A:

Q: Evolution is a gradual process that results in a change in the genetic composition of a population.…

A: Evolution is defined as the process where the characteristic of a species or a population occurs due…

Q: All living organisms use DNA and RNA as their genetic code. Humans and roundworms, in fact, have 25%…

A: Evolution is defined as the change in trait of an individual in a species over a period of time.

Q: Scientists know that the last common ancestor between chimpanzees and humans lived 5-7 million years…

A: Among all the living organisms humans are considered to be closely related to the apes. The apes…

Q: The wings of a bat and the wings of a bird look very similar, however the bat's wings are more…

A: Answer:-  In this case the wings are similar in birds and bats it indicate the Convergent evolution…

Q: Which of the following is an accurate point that supports the idea that the earliest protocells…

A: DNA and RNA are the genetic material present in the cell.

Q: AMNIOTE EVOLUTION A cladogram shows the evolutionary relationships between groups of organisms. The…

A: Introduction Evolution:- Evolution refers to the change of characteristics of a population that can…

Q: What did Wegener call the giant land million years ago? Pangaea O Big Ol' Continent Gigantia…

A: The supercontinent began to break apart about 200 million years ago, during the Early Jurassic Epoch…

Q: How is a mass extinction event indicated in the Tree of Life? Significant gaps on the tree are…

A:

Q: The animals body plans that emerged from the Cambrian Explosion were multi-cellular and…

A: Originally, geologists identified the start of the Cambrian Period as the first appearance of…

Q: Climate change is affecting the chemistry of the world's oceans. In particular, the ocean water is…

A: First of all we need to eliminate all the options discussing spines because question only speaks…

Q: The term Anthropocene implies that

A: Epoch, in general, termed as a very important period of time in history

Q: The Cambrian Explosion occurred approximately 542 million years ago. During the Cambrian, what…

A: Cambrian explosion, took place between 541 million and approximately 530 million years ago. This…

Q: Below are some key events that took place during the long history of life on Earth. Arrange them in…

A: Constant change has characterized earth since its beginning some 4.5 billion years ago. life…

Q: Scientists Stanley Miller and Harold Urey set up an experiment modeling the environmental conditions…

A: Conclusion from stanley Miller and Harold urey experiment is:- Life assembled from chemical building…

Q: A. What is the PROTEROZOIC LIFE? B. Discuss the Great Oxygenation Event. C. Discuss the CAMBRIAN…

A: Geological time scale is a evolutionary event  which determines how the life appear , its…

Q: All of the following are possible explanations for the dramatic diversification of early animals…

A: The Cambrian explosion is one of the important evolutionary periods which is characterized by the…

Q: The first animals evolved O 6 thousand years ago 9.900 O 600 million years ago O 600 thousand years…

A: Evolution is the defined as the change in characteristics of organisms or populations over many…

Q: The Fossil Record is used to help explain the progress of evolution of species over the geologic…

A: The fossil recording is the vast work to be done in future to know the progress of evolution.As,…

Q: Approximately how long ago did homo sapen (humans) first  appear on Earth 2,000 years ago 5-7…

A: Homo sapiens are the species to which all modern human beings belong. The average brain mass of H.…

Q: The oxygen revolution changed Earth’s environmentdramatically. Which of the following took advantage…

A: The earth is approximately 4.54 billion years ago and the conditions at that time were not meant for…

Q: Here is the question: What was the likely source of the raw material incorporated into the first…

A:

Q: Most of the ATP created during aerobic cellular respiration occurs along the cristae of the…

A: The aerobic cellular respiration involves oxidation of glucose to release energy in the form of ATP.…

Q: Over geologic time, the concentration of 02 in Earth's atmosphere has increased. However, at the end…

A: Carboniferous period which is part of late Paleozoic era is associated with large underground coal…

Q: Mammals quickly diversified into their various recognizable forms (i.e. cats, dogs, bears, ocean…

A: The group of vertebrate animals that are characterized by the presence of mammary glands is termed…

Q: The first self replicating RNA molecules likely evolved sometime during the Eon. Archean Hadean…

A: Evolution is defined as the process by which living organisms acquire and transfer novel traits from…

Q: Single-celled Eukaryotes were preceded by what environmental development on Earth? O a. The forming…

A: Eukaryotes are the organisms having well defined nucleus with cellular organelles such as…

Q: Shows how modern organisms descended from common ancestors Structures that do not serve a function…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: How can embryos help scientists understand evolution? Embryos go through various stages that suggest…

A: Embryology is the branch of biology that studies embryogenesis or the formation of an embryo from a…

Q: Chronologically arrange the evolutionary events, with 1being the earliest and 6 the most recent.___…

A: Chronological event describe the timing of event as it occurred in the event of time period.…

Q: The reason we are able to fuel our cars and power our cities is due to the absence of certain…

A: The Carboniferous was a time of marine invertebrates with many different forms. Carboniferous period…

Q: An actin gene in humans is 92% identical to the homologous actin gene in mice. An actin gene in…

A: The actin gene, also known as ACTG1, is a human gene that codes for the beta-subunit of the protein…

Prokaryotic evolution

The term evolution means the gradual change or a transformation from a simple or primitive state to a complex or advanced state. Prokaryotic evolution is a concept that involves the evolution of the form and function of most primitive organisms (prokaryotes) through several stages and changes to form diverse life as a part of organic evolution.