Question

The oldest known fossils on Earth are most similar to:
Answer

animals

plants

fungi

bacteria

*I choose bacteria

Answer 1

bacteria

Answer 2

Yes, I believe it's bacteria too

Answer 3

yes. thanks :)

Answer 4

Earth's early atmosphere apparently lacked:
Answer

oxygen

carbon dioxide

water vapor

ammonia

*Oxygen

Answer 5

for the last 3.4 billion years, cyanobacteria performing photosynthesis; answer for first question

Answer 6

A. oxygen. Oxygen instead was produced as waste material by early prokaryotes. for second question

Answer 7

Yes :)

Answer 8

How about question 2? Do you agree with my answer?

Answer 9

A. oxygen. Oxygen instead was produced as waste material by early prokaryotes. for second question

Answer 10

Stromatolites are found in rocks as old as:
Answer

2.5 billion years

3.5 billion years

4.5 billion years

5.5 billion years

*3.5 billion years

Answer 11

3.5 billion years

Answer 12

Photosynthesis by bacteria produced ____ as a waste product.
Answer

glucose

carbon dioxide

oxygen

all of these are produced by photosynthesis

*Oxygen

Answer 13

it is oxygen

Answer 14

u are right

Answer 15

@KittyT

Answer 16

The first eukaryotic fossils are:
Answer

cyanobacteria

fungi

plants

protists

*cyanobacteria

Answer 17

its protists

Answer 18

Sorry for late reply b/c of the laggy of OpenStudy...and thanks for your quick reply..:)

Answer 19

A symbiotic relationship in which both organisms benefit is called:
Answer

parasitism

communism

mutualism

capitalism

*mutualism

Answer 20

next question plz

Answer 21

mutualism, other wise also called as symbiosis

Answer 22

next question plz

Answer 23

Yes..That's all..thanks everyone @sikinder @ZnappyDooZ

Answer 24

The questions are all correct! Congrats to us <3 Cheers :)