The first organisms to appear on Earth were chemoheterotrophs or chemoautotrophs ? -Biology

The first organisms to appear on Earth were chemoheterotrophs or chemoautotrophs ? -Biology
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The first organisms were (a) chemoautotrophs (b) chemoheterotrophs (c) autotrophs (d) eukaryotes

Description : The first organisms were (a) chemoautotrophs (b) chemoheterotrophs (c) autotrophs (d) eukaryotes

Last Answer : (c) autotrophs

The first organisms were (a) chemoautotrophs (b) chemoheterotrophs (c) autotrophs (d) eukaryotes

Description : The first organisms were (a) chemoautotrophs (b) chemoheterotrophs (c) autotrophs (d) eukaryotes

Last Answer : chemoheterotrophs

Microorganisms that use organic compounds as energy and carbon sources are a. Chemoheterotrophs. b. Chemoautotrophs. c. Photoautotrophs. d. Photoheterotrophs.

Description : Microorganisms that use organic compounds as energy and carbon sources are a. Chemoheterotrophs. b. Chemoautotrophs. c. Photoautotrophs. d. Photoheterotrophs.

Last Answer : c. Photoautotrophs.

Following are the two statements regarding the origin of life. (A) The earliest organisms that appeared on the earth were non-green and presumably anaerobes. (B) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct? (a) Both (A) and (B) are correct. (b) Both (A) and (B) are false. (c) (A) is correct but (B) is false. (d) (B) is correct but (A) is false.

Description : Following are the two statements regarding the origin of life. (A) The earliest organisms that appeared on the earth were non-green and presumably anaerobes. (B) The first autotrophic organisms were the chemoautotrophs that ... ) is correct but (B) is false. (d) (B) is correct but (A) is false.

Last Answer : (a) Both (A) and (B) are correct.

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called (a) photoautotrophs (b) chemoautotrophs (c) saprozoic (d) coproheterotrophs.

Description : Organisms which obtain energy by the oxidation of reduced inorganic compounds are called (a) photoautotrophs (b) chemoautotrophs (c) saprozoic (d) coproheterotrophs.

Last Answer : (b) chemoautotrophs

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called (a) photoautotrophs (b) chemoautotrophs (c) saprozoic (d) coproheterotrophs.

Description : Organisms which obtain energy by the oxidation of reduced inorganic compounds are called (a) photoautotrophs (b) chemoautotrophs (c) saprozoic (d) coproheterotrophs.

Last Answer : (b) chemoautotrophs

1st life on earth was (a) cyanobacteria (b) chemoheterotrophs (c) autotrophs (d) photoautotrophs. (

Description : 1st life on earth was (a) cyanobacteria (b) chemoheterotrophs (c) autotrophs (d) photoautotrophs. (

Last Answer : (b) chemoheterotrophs

What are Chemoautotrophs? -Biology

Description : What are Chemoautotrophs? -Biology

Last Answer : answer:

The first photosynthetic oxygen liberating organisms to appear on earth were (1) Cyanobacteria (2) Bryophytes (3) Green algae (4) Bacteria

Description : The first photosynthetic oxygen liberating organisms to appear on earth were (1) Cyanobacteria (2) Bryophytes (3) Green algae (4) Bacteria

Last Answer : (1) Cyanobacteria Explanation: Cyanobacteria or blue green algae were the photosynthetic organisms that lived in the ancient ocean. It liberated the oxygen found in the iron oxide.

83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3) Root nodule forming nitrogen fixers live as aerobes under free-living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Description : 83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3 ... living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Last Answer : Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

What is the first organisms that appear in an ecological community?

Description : What is the first organisms that appear in an ecological community?

Last Answer : Need answer

Which of the following would appear as the pioneer organisms on bare rocks?

Description : Which of the following would appear as the pioneer organisms on bare rocks?

Last Answer : Which of the following would appear as the pioneer organisms on bare rocks? A. Lichens B. Liverworts C. Mosses D. Green algae

What From earliest to most recent what is the correct order in which organisms appear in the fossil record?

Description : What From earliest to most recent what is the correct order in which organisms appear in the fossil record?

Last Answer : mendeleev creates a Periodic Tablemendeleev predicts undiscovered elementsmoseley arranges the Periodic Table by atomic numbera periodic table is created by mendeleevmendeleev predicts undiscovered elementsthe periodic table is arranged by atomic number by a man namedmoseley

Which of the following would appear as the pioneer organisms on bare rocks? (a) Mosses (b) Green algae (c) Lichens (d) Liverworts

Description : Which of the following would appear as the pioneer organisms on bare rocks? (a) Mosses (b) Green algae (c) Lichens (d) Liverworts

Last Answer : (c) Lichens

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter? (a) Larvae could appear in decaying organic matter. (b) Microbes did not appear in stored meat. (c) Microbes appeared from unsterilised organic matter. (d) Meat was not spoiled, when heated and kept sealed in a vessel.

Description : Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter? (a) Larvae could appear in decaying organic matter. (b) Microbes did not ... matter. (d) Meat was not spoiled, when heated and kept sealed in a vessel.

Last Answer : (d) Meat was not spoiled, when heated and kept

First organisms to evolve on the earth were :

Description : First organisms to evolve on the earth were :

Last Answer : First organisms to evolve on the earth were : A. saprotrophs B. autotrophs C. heterotroph D. Plants

$ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Description : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Last Answer : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The ... wrong D. If both As and R are wrong.

Following are the two statements regarding the origin of life : A.`" "` The earliest organisms that appeared on the earth were non-green and presumabl

Description : Following are the two statements regarding the origin of life : A.`" "` The earliest organisms that appeared on the earth were non-green and presumabl

Last Answer : Following are the two statements regarding the origin of life : A.`" "` The earliest organisms that appeared on ... D. Both (a) and (b) are false.

I'm first on earth, second in heaven, I appear twice in a week, and once in a year, I'm in the middle of the Sea. What am I? -Riddles

Description : I'm first on earth, second in heaven, I appear twice in a week, and once in a year, I'm in the middle of the Sea. What am I? -Riddles

Last Answer : The letter E.

I am in the beginning of the earth. I am at the end of the time. I appear two times in a week. I appear once in a year. What Am I ? -Riddles

Description : I am in the beginning of the earth. I am at the end of the time. I appear two times in a week. I appear once in a year. What Am I ? -Riddles

Last Answer : The Letter 'E'.

Stars appear to move from east to west because the (a) Whole universe is moving from east to west (b) Earth is revolving around the sun (c) Earth is rotating from east to west (d) Earth is rotating from west to east

Description : Stars appear to move from east to west because the (a) Whole universe is moving from east to west (b) Earth is revolving around the sun (c) Earth is rotating from east to west (d) Earth is rotating from west to east

Last Answer : Ans:(d)

Constellations appear to change their positions at different times of night because (a) the earth revolves round the sun (b) the earth rotates about its axis (c) the constellations move faster than the earth (d) the earth and the constellations move in opposite directions

Description : Constellations appear to change their positions at different times of night because (a) the earth revolves round the sun (b) the earth rotates about its axis (c) the constellations move faster than the earth (d) the earth and the constellations move in opposite directions

Last Answer : Ans:(b)

What is the evidence that the first life on earth was simple, single-celled organisms?

Description : What is the evidence that the first life on earth was simple, single-celled organisms?

Last Answer : microfossils

Can you believe that there are living organisms on the Earth that are over 5,000 years old?

Description : Can you believe that there are living organisms on the Earth that are over 5,000 years old?

Last Answer : answer:First, I do. It's life anyway, anything can happen. And as long as the age of an organism is within the Earth's age, the organism can stand a chance of living so long. Moreover, it' ... of living for a very long time (one tree actually outlives a turtle). Second, where is the source?

the most diverse and prevalent organisms on earth are -General Knowledge

Description : the most diverse and prevalent organisms on earth are -General Knowledge

Last Answer : This answer was deleted by our moderators...

What do all organisms on earth have that are made of DNA?

Description : What do all organisms on earth have that are made of DNA?

Last Answer : no they all are not made of only DNA some of them are made by RNA its only happens in 1% of organism

Dead reamins of organisms found in the earth crust are the:

Description : Dead reamins of organisms found in the earth crust are the:

Last Answer : Dead reamins of organisms found in the earth crust are the: A. Palaentological evidences ... C. Antamocial evidences D. Physicological evidences

Number of known species of organisms on this earth is

Description : Number of known species of organisms on this earth is

Last Answer : Number of known species of organisms on this earth is A. 5.0 million B. 3.2 million C. 1.7 million D. 1.32 million

Are reservoirs that chemical elements can move through as part of the Earth's biogeochemical cycle I.the solid Earth II.Earth's oceans III.Earth's atmosphere IV.organisms on Earth?

Description : Are reservoirs that chemical elements can move through as part of the Earth's biogeochemical cycle I.the solid Earth II.Earth's oceans III.Earth's atmosphere IV.organisms on Earth?

Last Answer : Need answer

In what way are are living organisms on earth similar?

Description : In what way are are living organisms on earth similar?

Last Answer : They are all assembled from a nucleic acid code

What Multi cell living organisms have lived on earth for how many years?

Description : What Multi cell living organisms have lived on earth for how many years?

Last Answer : What is the answer ?

What is the most likely consequence if a group of living organisms is unable to adapt to changing conditions within the Earth system?

Description : What is the most likely consequence if a group of living organisms is unable to adapt to changing conditions within the Earth system?

Last Answer : Need answer

What organisms about half of the oxygen on earth?

Description : What organisms about half of the oxygen on earth?

Last Answer : trees

Biosphere refers to – (1) the area of the land inhabited by living organism (2) the part of ocean inhabited by plants and animals (3) the portion of the earth, including the oceans, the land, the soil and the atmosphere inhabited by living organisms (4) the atmosphere surrounding the living organisms

Description : Biosphere refers to - (1) the area of the land inhabited by living organism (2) the part of ocean inhabited by plants and animals (3) the portion of the earth, including the oceans ... land, the soil and the atmosphere inhabited by living organisms (4) the atmosphere surrounding the living organisms

Last Answer : (3) the portion of the earth, including the oceans, the land, the soil and the atmosphere inhabited by living organisms Explanation: The biosphere is the global ecological system integrating all living beings ... up of the parts of Earth where life exists. It is the worldwide sum of all ecosystems.

The food chain refers to the transfer of energy from : (1) the interior of the earth to the surface (2) lower to higher latitudes (3) one organism to another (4) organisms of the land to those of the sea by means of river

Description : The food chain refers to the transfer of energy from : (1) the interior of the earth to the surface (2) lower to higher latitudes (3) one organism to another (4) organisms of the land to those of the sea by means of river

Last Answer : (3) one organism to another Explanation: A food chain is a linear sequence of links in a food web starting from atrophic species that eats no other species in the web and ends at a ... linear monophagous pathways. A common metric used to quantify food web trophic structure is food chain length.

Exobiology deals with the study of - (1) external characters of living organisms (2) life on the surface of the earth (3) life in the outer layers of atmosphere (4) life in other planets and space

Description : Exobiology deals with the study of - (1) external characters of living organisms (2) life on the surface of the earth (3) life in the outer layers of atmosphere (4) life in other planets and space

Last Answer : (4) life in other planets and space Explanation: Exobiology is the branch of science that deals with the possibility and likely nature of life on other planets or in space. The primary ... processes leading to the origin evolution and distribution of life on Earth or elsewhere in the universe.

The organisms responsible for the characteristic musty or earth odor of a freshly plowed fieldis/are A.Nocardia B.Streptomyces C.Micromonospora D.all of these

Description : The organisms responsible for the characteristic musty or earth odor of a freshly plowed fieldis/are A.Nocardia B.Streptomyces C.Micromonospora D.all of these

Last Answer : D.all of these

“There are more living organisms in a teaspoonful of soil than there are people alive on Earth.”

Description : “There are more living organisms in a teaspoonful of soil than there are people alive on Earth.”

Last Answer : Soil is alive! Much more than a prop to hold up plants, healthy soil is a jungle of creatures eating, digesting, and reproducing their way toward soil fertility – without them, our food and plant life would not grow.

“There are more living organisms on the skin of each human than there are humans on the surface of the earth.”

Description : “There are more living organisms on the skin of each human than there are humans on the surface of the earth.” 

Last Answer : It's estimated that there are 50 million bacteria per cm2 of average human skin, which equates to 100 billion for the average human body. Then there are all the other microorganisms, such as ... the human skin. Usually these creatures will do no harm, they will just be microscopically ever-present.

Exobiology deals with the study of : (1) external characters of living organisms (2) life on the surface of the earth (3) life in the outer layers of atmosphere (4) life in other planets and space

Description : Exobiology deals with the study of : (1) external characters of living organisms (2) life on the surface of the earth (3) life in the outer layers of atmosphere (4) life in other planets and space

Last Answer : life in other planets and space

Biosphere refers to (1) the area of the land inhabited by living organism (2) the part of ocean inhabited by plants and animals (3) the portion of the earth, including the oceans, the land, the soil and the atmosphere inhabited by living organisms (4) the atmosphere surrounding the living organisms

Description : Biosphere refers to (1) the area of the land inhabited by living organism (2) the part of ocean inhabited by plants and animals (3) the portion of the earth, including the oceans, the land, the soil and the atmosphere inhabited by living organisms (4) the atmosphere surrounding the living organisms

Last Answer : the portion of the earth, including the oceans, the land, the soil and the atmosphere inhabited by living organisms

The food chain refers to the transfer of energy from : (1) the interior of the earth to the surface (2) lower to higher latitudes (3) one organism to another (4) organisms of the land to those of the sea by means of river

Description : The food chain refers to the transfer of energy from : (1) the interior of the earth to the surface (2) lower to higher latitudes (3) one organism to another (4) organisms of the land to those of the sea by means of river

Last Answer : one organism to another