Which event in Earth’s historyeventually lead to the evolution of multicellular lifeforms?

Q: In which probable stage of physical and chemical evolution of life were gaseous oxygen and water…

A: Earth was formed some 4.6 billion years ago from the sun due to the continuous bombardment of huge…

Q: What experimentation has been done on finding the source or raw material for the first life on…

A: Harold Urey and Stanley Miller are two American scientists who attempted to create similar…

Q: Which of the following events did NOT occur during the Cenozoic?

A: The Cenozoic Era is a geological era that began around 66 million years ago and continues to the…

Q: Which organisms came and went during the Mesozoic era?

A: MESOZOIC ERA:- It is the era when the conifers, reptiles, dinosaurs were present in plenty of…

Q: The term “Cambrian explosion” refers to (a) an increase in biodiversity. (b) a mass extinction. (c)…

A: Answer: Introduction: The Cambrian explosion or Cambrian radiation was an incident about 541 million…

Q: List the four large time periods into which biologists divide the earth’s past

A: The geologic time scale (GTS) is a system of chronological dating that classifies geological strata…

Q: How did the researchers use the DNA of living sponges to make conclusions about events occurring…

A: Answer- Every organism in a particular species have 99 percent same DNA sequence. Even among…

Q: Explain how the diversity of life evolved over time.

A: The term biological diversity or biodiversity refers to the variety of living organisms and their…

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: Which of the following eras in Earth's history is the longest? Precambrian Cenozoic Paleozoic…

A: A geological era divides eon into smaller unit of time. Geological era are further divided into…

Q: Colonization of Land The Cambrian explosion Flowering plants Endosymbiosis Origin of Reptiles First…

A: Introduction : The Geologic Time Scale divides the Earth's history into four…

Q: outline major stages in life evolution, and describe how the landsurface changed as life evolved.

A: The period from 4600 mya to 2500 mya is called Archean eon.

Q: Before the emergence of life of what gases was the earth's primitive atmosphere constituted?

A: the primitive atmosphere was reducing in nature it had little or no oxygen  it was rich in water…

Q: Which of the mass extinctions was the largest? What percentage of life went extinct during that…

A: Mass extinction is defined as the dis-appearance of a large scale of biodiversity (animals +plants…

Q: According to "Our Earliest Ancestors", what time period is being discussed in this video?    A.The…

A: The Eocene, Miocene, Pleistocene, and Paleocene are all epochs in the geologic time scale. They are…

Q: Which of these steps probably occurred first in the chemical andbiological evolution of life?a. The…

A: All living organisms are made up of organic components like carbohydrates, proteins, lipids, etc.

Q: How did the Paleozoic era end?

A: Paleozoic era is the earliest era that has occurred in the Phanerozoic eon. It is the largest of all…

Q: How the evolution of oxygen was involved in the initial evolution of terrestrial life

A: Photolysis of water vapors and carbon dioxide produce hydroxyl and oxygen, individually, thus, they…

Q: which statement about macroevolution is true? a. The history of life on Earth follows a general…

A: ANSWER;- c). The theory of gradualism proposes that major evolutionary changes that happen…

Q: What Were the Earliest Organisms Like?

A: Evolution is a gradual process, and according to the theory of evolution, all species are related…

Q: The greatest mass extinction episode in the history of life occurred at what boundary? (a)…

A: Mass Extinction events can be defined as those events in which half or more than half of all…

Q: Do plants and animals have a common multicellular ancestor?

A: Yes plants and animals have common ancestor.plant cells are characterised by cell wall and…

Q: How were biomolecules likely to have formed on the early Earth?

A: The fundamental biochemical similarities that were observed in living organisms have developed…

Q: Which era is furthest in the past? O A. Cenozoic O B. Mesozoic O C. Paleozoic O D. Precambrian

A: According to the timeline of the evolutionary history of life, all present-day organisms have been…

Q: Which of the following is associated with the Cenozoic era? O a. Warmer planet O b. Different…

A: The answer is given below:    The first two are associated with the Cenozoic era.

Q: Plant life first appeared on land during which of the following periods? a. Cambrian period b.…

A: The palaeozoic era was divided into six periods and these were as follows: Cambrian Ordovician…

Q: Cenozoic Era

A: The Cenozoic era began about 66 million years ago and continues into the present, is the third era…

Q: This kettle lakeformed 14,000 yearsago when a glacierthat covered thesurrounding areamelted.…

A: The biological organisms are known to change certain characteristics that are inherited to the next…

Q: What period did modern humans evolve?

A: Modern human beings are classified under the Tribe: Hominini under the Suborder: Anthropoidea of…

Q: Which of the following is characteristic of the end of the Paleozoic Era? a There was a mass…

A: As experts believe, the Earth was formed as a result of the Big Bang Explosion. The geological time…

Q: ss the major subdivisions of Geologic Time and its contributions to civilization in 100 words each…

A: The  time interval occupied by the geologic history of Earth is known as geologic time. The geologic…

Q: The eon comprising the Cambrian period up to the present is called the (1). It is divided into three…

A: Geological time scale is the calendar for events in the Earth history. It is subdivided into eons,…

Q: How did the presence of molecular oxygen in the atmosphere affect early life?

A: Life originated nearly 3.6 billion years ago in the deep ocean.  The first organisms to be evolved…

Q: Did dinosaurs and humans ever exist at the same time?

A: Homo habilis, which existed between 2.4 and 1.4 mya in Eastern and Southern Africa, is among the…

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: Which of the following events did NOT occur during thePrecambrian?a. Formation of the ozone layerb.…

A: Introduction The Precambrian Period, which predates the current Phanerozoic Eon, is the earliest…

Q: Which organism is an endosymbiont?

A: The organism is defined as the any individual entity that embodies the properties of life. It is…

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.