Single-celled Eukaryotes were preceded by what environmental development on Earth? O a. The forming of oceans O b. Prokaryotes releasing CO2 into the atmosphere O c. Prokaryotes releasing oxygen into the atmosphere o d. The formation of Pangea

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: Which bits of evidence would convince you that life originated as early as 3.2 bya? a. You look at…

A: The change in the heritable characteristics of the species across many generations is called…

Q: Discuss the length of time prokaryotes were the dominant organisms living on earth.

A: Prokaryotic organisms are characterized by the absence of a well defined nucleus and membrane bound…

Q: In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration…

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

Q: What is a todays world example of endosymbiosis?

A: Endosymbiosis is defined as a mutually benefitted relationship between a host organism and another…

Q: Place these events in the history of life on Earth in the order that they occurred. a. accumulation…

A: Evolution is the process of slow gradual change over a period of time.  The process of evolution…

Q: These are one of the most important fossil record of the early life forms here on Earth and formed…

A: Q.These are one of the most important fossil record of the early life forms here on Earth and formed…

Q: The first appearance of free oxygen in the atmospherelikely triggered a massive wave of extinctions…

A: An ecosystem is a large community of living organisms in a specific area in which the biotic and…

Q: What is the term for bits of rock and dirt? O A. Mesozoic O B. Half-life O C. Sediment O D.…

A: An MCQ has been asked. Have to name a term for bits of rock and dirt.

Q: Which of the following events occurred first in eukaryotic evolution? a. Endosymbiosis and…

A: Answer is c.)  compartmentalization and formation of nucleus.

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: Describe the hypothesized steps in the origin of eukaryotic cells.

A: Eukaryotes are multicellular organisms whose cells have membrane bound organelles, well-defined…

Q: Which of the following describes the organisms and/or processes that were most influential in the…

A: The earth is one of the eight planets revolving around the sun. It is estimated that earth have been…

Q: Which idea stems from the theory of evolution? - a. The earth is relatively young. b. Each…

A: Evolution is change in the heritable credits of normal peoples over reformist ages. These ascribes…

Q: Explain how the origin of eukaryotic cells involved a unionbetween bacterial and archaeal cells.

A: Answer- The eukaryotic cells are evolved from the prokaryotes.

Q: The first single-celled organisms on Earth probably evolved (a) 3,700 years ago (b) 3.7 million years…

A: Evolution is a process of slow and gradual change over a period of time. There are many pieces of…

Q: On the geologic time scale, life originated in the_____ . a. Archean c. Phanerozoic b. Proterozoic…

A: The geologic time scale is a chronological dating system that classifies geological strata into…

Q: In what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2)…

A: C is possible right answer

Q: Metagenesis takes place below the Earth's surface where temperature is less than 150°C . Select one:…

A: Answer : True

Q: Scientists propose that the first macromolecules in protobiontswerea. DNA molecules.b. RNA…

A: Macromolecules are large molecules composed of thousands of covalently connected atoms. Proteins,…

Q: Why was it believed that life began in the seas and not in land or air? * Land and air were…

A: Option a is correct  Land and air were inhospitable places for life during the archean eon.

Q: Why were cyanobacteria so important in the evolution of life onEarth?

A: Cyanobacteria is a known phylum that is known to contain the photosynthetic bacteria along with the…

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: The most pivotal event in the history of life on Earth, allowing for the emergence of eukaryotic…

A: A Eukaryotic cell is a Membrance bound organelle like Endoplasmic Reticulum, Mitochondria and…

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: Which factor most likely caused animals and plants in India todiffer greatly from species in nearby…

A: Among the given options, option (d) is the most appropriate.Upon the analysis of the rock…

Q: Rock strata with fossils Which organism is most recent? a b d a

A: Fossils These are defined as the remains of organisms such as plants, animals, single-celled living…

Q: Adaptive radiation

A: Evolution evolution is a process by which organisms adapt and grow to serve better in their natural…

Q: Why was it believed that life began in the seas and not in land or air?

A: Scientists believe that the life on the earth began in the depths of the ocean and not on the…

Q: Which of these events occurred in the Mesozoic era? First mammals First cyanobacteria First bacteria…

A: Mesozoic era has three periods cretaceous, Jurassic and Triassic periods. It is the age of reptiles.

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: Match the forms of life below with the earliest (approximate) time that it existed. Note: the earth…

A:

Q: In which era did humans first appear on Earth? O A. Paleozoic O B. Mesozoic C. Precambrian O D.…

A: Humans do not evolve from the todays chimpanzees but human develop along side with the chimpanzees…

Q: where on the earth did life mostly likely first emerge, where all the ingredients and conditions for…

A: There is an evidence that life began as early as 4.5 billion years ago , and had been reported in a…

Q: what key trait of life developed with the emergence of multicellular organism, the third threshold…

A: Multicellular organisms are those where there is specialization of different cells for various…

Q: How greatly do men cause Earth to change? Does it signify the start of a new epoch

A: Epoch is defined as the fixed point of time in history, which is established y the occurrence of…

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

A:

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

A: The process of evolution of multicellular life from simpler, unicellular microbes was an important…

Q: If the evolution of life was placed on  a 24 hour clock, when did humans arrive? a.  At the 30…

A: The geologic time scale of Earth is divided into four large segments called Eons: Hadean, Archean,…

Q: The field of geology helped to set the stage for the Theory of Evolution through an understanding…

A: Evolution is the science of how life evolves over ages, and evolutionary biology is the science of…

Q: Use the following choices to answer question 1-3. Each choice can be used once, more than once, or…

A: All living organisms are classified based on their internal and external features. The science of…

Q: Scientists hypothesize that very simple cells could have arisen through four steps. Place thos 4…

A: Evolution is defined as the change in characteristics of individual over a period of time. All…

Q: A. What do scientists think the primitive Earth was like? Give 3 evidences.   B. How could life…

A: Our current atmosphere of twenty one percent oxygen would make the emergence of DNA & other…

Q: Approximately when did life first appear on land A. 500 million years ago B. 2 billion years ago…

A: Question - Approximately when did life first appear on land A. 500 million years ago B. 2 billion…

Q: Which sequence of events accurately describes the history of the planet (from oldest to youngest)?

A: The history of our planet, Earth, started with the formation of the solar system. The solar system…

Q: There was a large proliferation of fossils showing increase in diversity of life.What period is this

A: Geological time scale is the calendar for events in Earth's history. It is divided into eras,…

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.