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
Anvisha [2.4K]
2 years ago
5

Banded iron formations show us when

Biology
1 answer:
Irina-Kira [14]2 years ago
6 0

Answer:

oxygen became plentiful on earth

Explanation:

This is because banded iron formation is formed as a result of oxygen present in the ocean which is produced from cyanobacteria which undergo photosynthesis to produce carbohydrates and oxygen.

The oxygen produced are plentiful and they react with dissolved iron on the Earth's ocean to produce iron oxides which precipitated out and form a thin line floor on the ocean.

You might be interested in
Please answer fast I'll mark brainliest
Leni [432]

Answer:

anther: produces pollen

ovule: contains egg cells

sepal: protects the flower bud

petal: surrounds the reproductive structures

Explanation:

6 0
2 years ago
A low area of land often forms between hills or mountains. This low area is
Maurinko [17]

Answer:

b

Explanation:

lava is hot and needs to flow

6 0
2 years ago
This flower has male and female reproductive parts. Identify the flower’s male reproductive parts.
Gre4nikov [31]
"The male parts of the flower are called the stamens and are made up of the anther at the top and the stalk or filament that supports the anther."
3 0
3 years ago
Is a threadlike form of genetic material loosely dispersed throughout the nucleus when a cell is not dividing?
lord [1]
Chromatin is the threadlike form of genetic material in the nucleus.
 
(chromatin coils around histone proteins and form chromosomes when mitosis/meiosis are going to occur)
3 0
2 years ago
which of the following is a major form of animal communication? a. body language b. locomotion c. hoarding d. feeding
frez [133]
I would say body language because animals can detect threats
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following describes a relationship of mutualilism?
    15·2 answers
  • Two functions of centrioles
    9·1 answer
  • Describe examples of allopatric radiation in the madagascar-india landmasses and dusky salamanders.
    9·1 answer
  • Which of the following statements about the role of the respiratory system in maintenance of blood pH is not true?Select one:
    14·1 answer
  • Write a summary equation for photosynthesis, showing the reactants and the products of the overall reaction
    9·1 answer
  • What happens to food material that cannot be digested?
    9·2 answers
  • What are somethings people do that increase water erosion on beaches and on surface areas within continental interiors?
    15·2 answers
  • How does that landslide change the
    15·1 answer
  • How is energy and forces related
    8·1 answer
  • Consider plant roots and stems. Which tropism affects both these plant tissues? Which tissue experiences negative tropism versus
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!