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
Mnenie [13.5K]
4 years ago
7

21. When did the Precambrian era end?

Biology
2 answers:
labwork [276]4 years ago
6 0

Answer: The Precambrian era ends abot 540 million years ago.

Explanation:

The Precambrian era is the first geologic era of the Earth, it initiates from the Earth's formation (4600 million years ago) and ends at the beginning of the Cambrian era (541 million years ago). It is the longest geologic era of the Earth.  

Masja [62]4 years ago
4 0

Answer: approximately 540 million years ago

Explanation:

You might be interested in
What is the name of the muscular layer in blood vessels.
AfilCa [17]

Answer:

tunica media hope this helps

3 0
2 years ago
Match the Following:
Vlad [161]

1. Centrioles can be correctly matched with F, that is, produce the spindle fibers for cell division.

2. Nucleolus can be correctly matched with G, that is, produce r-RNA to make ribosomes.

3. Nucleus can be correctly matched with B, that is, round structure within the cell.

4. Endoplasmic reticulum can be correctly matched with E, that is, channel through which molecules move in cytoplasm.

5. Golgi bodies can be correctly matched with D, that is, produce and package cell secretions.

6. Ribosomes can be correctly matched with A, that is, tiny structures which synthesize proteins.

7. Chromosomes can be correctly matched with C, that is, contain genes with the information controlling cell.

3 0
3 years ago
Read 2 more answers
Define the term dichotomous key if DICH- means in two and -TOMOUS means to cut.
zalisa [80]
The meaning is something that splits in two for example a dichotomous leaf a leaf that splits in two
7 0
3 years ago
IMAGE ABOVE<br><br> ITS REALLYYY EASY FOR OTHERS PLEASE HELP ONLY A SMALL PARAGRAPH OR LESS
sattari [20]
It can change but inter fearing with each other
6 0
4 years ago
Which type of wave interaction is shown in the diagram?
Fudgin [204]

Answer:

Its ether the last option or the first one.

Explanation:

I hope this helps you!

6 0
2 years ago
Other questions:
  • In which type of joint are two bones joined by cartilage?
    10·1 answer
  • Insulin is an important hormone that allows the body to use glucose from food. After an individual eats a meal, glucose travels
    11·1 answer
  • The immediate source of energy that powers a cell’s activities is
    14·2 answers
  • Which prediction methods are best for making long-term predictions?<br><br><br> EARTH SCIENCE!!!
    12·1 answer
  • Two features of eukaryotic cells that prokaryotic cells lack
    8·1 answer
  • Which bone is identified in the picture below?
    9·1 answer
  • The movement of water from the roots through the plant and out of the leaves is known as the... what
    11·1 answer
  • Explain why a disease that affects cells is a problem for the whole organism?
    14·1 answer
  • Explain why crossing-over gives us so much genetic variation (differences in organisms).
    5·1 answer
  • Which statement accurately describes the 13 American colonies?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!