1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
oee [108]
3 years ago
8

Which of these would be evidence that cyanobacteria evolved the ability to perform photosynthesis and released oxygen as a bypro

duct over 2 billion years ago? A) The presence of iron oxides (rust) in sedimentary rock layers that are 2 billion years old B) The presence of an iridium-rich layer in sedimentary rock dating from times of mass extinctions C) The presence of chloroplasts in fossilized eukaryotes from fossils dating from 2 billion years ago forward D) The formation of stromatolite rock structures from aggregates of cyanobacteria dating 3.5 billion years ago
Biology
2 answers:
3241004551 [841]3 years ago
6 0

Answer:

A) The presence of iron oxides (rust) in sedimentary rock layers that are 2 billion years old.

Explanation:

Cyanobacteria perform photosynthesis using sunlight, water and carbon dioxide to produce carbohydrates as well as oxygen. In fact, to this day, all plants on Earth contain cyanobacteria - known as chloroplasts - that participate in photosynthesis. This is how oxygen arrived on earth over 2 billion years ago.

A great evidence of this moment is the presence of iron oxides (rust) in 2 billion year old sedimentary rock layers. Since it is the first report of an element that has oxygen in its composition.

zavuch27 [327]3 years ago
4 0

Answer:

A) The presence of iron oxides (rust) in sedimentary rock layers that are 2 billion years old.

Explanation:

  • Cyanobacteria are aquatic and photosynthetic ,they live in water and manufacture own food releasing oxygen as a by product and in which most living organisms depend on.
  • Cyanobacteria are found in the ocean and are believed to be responsible for the formation of the iron oxide found on the sedimentary rocks since they release oxygen as a by product and it is used in the iron oxide formation process below the level of wave disturbance.

You might be interested in
Need this ASAP!!HELP!!
djverab [1.8K]

Answer:

The cells belong to the tissue level of organization

Explanation:

Living organisms are composed of four levels of organization; the cell, tissues, organs and organ systems.

The cell is the basic unit of life  and the smallest level of organization.

Tissues are group of cells with a common origin which work together to perform a similar function.

Organs are composed of different types of tissues and perform various complex functions. in the organism.

Organ systems are groups of organs that perform similar functions or which work together for a specific function.

A plant leaf is an organ which is made up of various tissues such as the dermal, vascular and ground tissues.

The dermal cells known as the epidermis belong to the tissue level of organization as they perform a similar function of protecting against mechanical injury and invasion by microorganisms

4 0
3 years ago
What are the like terms in the expression: 2a + 3b+ 4C - 5a + 8 - 4
irakobra [83]

Answer:

2a and -5a

8 and -4

hahahah they are separate from each other

2a and -5a simplifies to -3a

8 and -4 simplifies to 4

Explanation:

hope this helps!

5 0
3 years ago
What's the difference between transcription and translation?
sveta [45]

Answer:

Transcription is the synthesis of RNA from DNA. Occurs in the nucleus.

Translation is the synthesis of a protein from RNA. Occurs in the cytoplasm.

Explanation:

pls mark me brainliest

3 0
4 years ago
Help plezz if u can
irinina [24]

Answer:

1. It seeps in the ground and becomes ground water.

2. It falls back down to earth as Rain, Hail and Snow.

3. Water moves through the living organisms in an ecosystem

4. Transportation is the process that moves things like water from one place to another.

Explanation:

I passed Biology last year in 10th so I recalled my biology stuff.

4 0
3 years ago
A father has Type B blood, and Grandpa (Dad’s dad) had Type O blood. The mother has type AB blood. What blood types would be rea
notka56 [123]
Blood group AB because the child’s father have pathogen a and mother has both pathogens hence the child will have both pathogen from both parents hence blood group will be AB
4 0
2 years ago
Other questions:
  • ) determine the uscs classification (symbol and description) for both soils
    14·1 answer
  • Which of the following best describes the process of meiosis?
    8·1 answer
  • Which of the following is least important when considering lab safety?
    8·1 answer
  • Constants | Periodic Table Suppose your biking partner claims that hyperventilating at the bottom of steep hill climbs is a good
    5·1 answer
  • Reynaldo is usually good-natured and fun-loving. Women enjoy his warmth and sense of humor. After a number of drinks, he becomes
    12·1 answer
  • Which of the phrases from the paragraph is an example of a simile?
    10·1 answer
  • Which of the following best describes a eukaryotic cell?
    12·1 answer
  • The least numerous but the largest of the papillae are arranged as a V-shape on the posterior dorsal surface of the tongue. They
    9·1 answer
  • What are the different components at Ecosystem?​
    12·1 answer
  • It would gain nutrients from the water in the environment.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!