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
alexgriva [62]
3 years ago
14

How many years did the precambrian era span

Biology
1 answer:
frozen [14]3 years ago
5 0

Answer: Precambrian, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, 541 million years ago.

Explanation:

i don't if this is want your looking for but hope it helps

You might be interested in
Which factor is a major cause of global warming?
Inessa [10]

Answer: increased burning of fuels

Explanation:

could i perhaps get brainliest

5 0
3 years ago
Read 2 more answers
One difference between human cheek cells and onion cells is: 1. the presence of cytoplasm 2. the absence of a nucleus in the pla
AysviL [449]

Answer:

3. the absence of a cell wall in human cells

Explanation:

Animal cells do not have cell walls. Cell membranes separate the cytoplasm of the animal cells from the surroundings and maintain their interior. Plant cells have cellulosic cell walls. A cell wall surrounds the cell membrane of a plant cell. Cell walls serve to provide structural support and protect plant cells from pathogens. Cell walls also help keep excess water out of cells so they do not burst. Therefore, human cheek cells would not have cell walls while the onion cells would have cell walls made up of cellulose.

6 0
3 years ago
Help me what’s the answer
Kazeer [188]
The answer i believe is “c”
5 0
3 years ago
How does the carbon locked in shells of marine organisms move back to the atmosphere?
puteri [66]

Most of the carbon that's stored in plants - and in anything that eats them - is released back into the atmosphere by respiration when the organisms die and are eaten by microbes.

The answer is B

3 0
3 years ago
Which of the following is a limitation of a clinical trial?
ExtremeBDS [4]

Answer:

D: Hospital costs

Explanation

I believe this should be correct

3 0
2 years ago
Other questions:
  • A testable hypothesis could be formed from which question
    15·2 answers
  • Which type of glia is responsible for removing waste materials and attacking foreign invaders such as fungi and viruses?
    9·1 answer
  • Which body system includes vitamin D production and protection against pathogens and excess water loss? Integumentary system Mus
    9·1 answer
  • A cell with 10 chromosomes undergoes mitosis. How many daughter cells are created? ___ Each daughter cell has ___ chromosomes.
    12·1 answer
  • Predict what would happen if a plant from a deciduous forest were transplanted to the tundra. Explain
    6·1 answer
  • A volcano begins erupting after sitting dormant for 200 years. lava spills from the vent and poured down the sides of the mounta
    14·1 answer
  • What is known as the brain of cell
    10·2 answers
  • Which of these is a physical factor that can influence the amount of plant life that can grow in an ecosystem?
    12·1 answer
  • PLEASEEEE HELPPPPPPPPPPP
    14·1 answer
  • Does DNA or RNA contain guanine
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!