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
yarga [219]
3 years ago
10

The appearance of banded iron layers in the rock record between 1.08 and 3.8 billion years ago reflect the alteration of oxygen-

rich and oxygen-poor conditions in the ocean at that time.
True or False
Biology
1 answer:
ohaa [14]3 years ago
8 0

The appearance of banded iron layers in the rock record between 1.08 and 3.8 billion years ago reflect the alteration of oxygen-rich and oxygen-poor conditions in the ocean at that time is True.

<u>Explanation:</u>

The banded iron formation of the rock is directly related with the atmospheric oxygen content of that time. The thorough study by the scientists revealed an interesting result. The study showed that about 3 billion years ago, in Canada, there were no oxygen in atmosphere or ocean as well.

This resulted in the increase of the photosynthesizing organisms. The chemicals released from the organisms reacted to the iron of the ocean to deposit iron oxide layer on rocks to form these layers.  

You might be interested in
Consider the aquatic phosphorus cycle. On land most phosphorus is found in rocks and minerals. In the oceans, phosphorus is depo
liraira [26]
D) Weathering
<span>
Over time, rain and </span>weathering<span> cause </span>rocks<span> to release phosphate ions and other minerals.</span>
3 0
3 years ago
Read 2 more answers
What cell made of what?
Orlov [11]

Answer:

The tree main cell components are: plasma membrane, cytoplasm and nucleous

Explanation:

The plasma membrane is the a bilipid membranous layer composed of proteins and carbohydrates.

The cytoplasm is a jelly-like substance composed of mainly water and found between the cell membrane and nucleus.

The nucleous is an organelle which contains genetic information (DNA) on special strands called chromosomes.

5 0
3 years ago
Reaching down to pet your dog is a voluntary action communicated to your muscles via the _____ nervous system.
kirill [66]
Reaching ...............via the SOMATIC nervous system.
The somatic nervous system is the part of the peripheral nervous system which is associated with associated with voluntary control of body parts.
The major functions of the somatic nervous system is voluntary movement of muscles and organs.
4 0
3 years ago
How did the vinegar affect the digestion of starch?
sesenic [268]
Acids correspond to volatile molecules that release positive hydrogen ions. These ions have a profound effect on the other molecules in foods. Also, they can affect the cells in your body, fortunately, our taste buds help us regulate the number of free hydrogen ions we eat by making us perceive acids as sour tasting.

3 0
3 years ago
The two main divisions of the trade industry are?
Rina8888 [55]

Answer:

The correct answer is Wholesalers and Retailers

Explanation:

By and large, the retailing and wholesaling businesses (regularly alluded to as the distributive trades sector) speak to the transitional strides in the dispersion of stock or goods among manufacturers and consumers of merchandise.

Wholesale and retail exchange services are critical to the proficient and viable progression of merchandise from manufacturers to consumers.

Together the wholesaling and retailing enterprises represent critical bits of monetary yield and worldwide business.

4 0
3 years ago
Other questions:
  • Which processes of the water cycle move water from the atmosphere into surface water reservoirs?
    14·1 answer
  • Which of the following cells would not have a well–defined nucleus but would have a thick cell wall and Ribosomes?
    9·1 answer
  • WILL MARK BRAINLIEST! HELP ASAP
    13·1 answer
  • How do y'all deal with stress?
    13·2 answers
  • What accounts for the way most traits develop in organisms?
    5·2 answers
  • Explain why stress - strain curve usually has two segments
    13·2 answers
  • Blue poppies native to China were grown at a plant-breeding center in California. The plants with the thickest leaves were most
    6·1 answer
  • Papaya leaves have veins that resemble fingers diverging from a palm. Papaya leaves are an example of which venation pattern?
    8·2 answers
  • How often does an average volcano erupt?
    8·1 answer
  • She doesn't know the whole course because she was absent the day we were learning this so, she needs more help!! (My friend)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!