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shepuryov [24]
2 years ago
13

Which era is characterized by stromatolites as the most abundant fossil?

Biology
1 answer:
Novosadov [1.4K]2 years ago
7 0

Answer:

Precambrian

Explanation:

tromatolites were common in Precambrian time. Some of the first forms of life on Earth are recorded in stromatolites present in rocks 3.5 billion years old.

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HELPPPP!!! ASAPPPPP!!!
atroni [7]

Answer:

option A IS THE ANSWER : jellyfish, sea anemones, and sponges

Explanation:

<em>IF IT IS CORRECT PLEASE MARK AS BRAINLIEST</em>

4 0
3 years ago
Somebody help me out
Bingel [31]

Answer:

SecondOption - "Mid oceanic ridge"

Explanation:  

<em> Mid-ocean ridges are formed by divergent plate boundaries in the ocean. This is where upwelling magma creates new seabed. A diverging plate boundary occurs when two plates move away from one other. Magma rises from deep beneath the Earth and erupts along these boundaries, forming new crust on the lithosphere. The majority of divergent plate borders are undersea, forming submerged mountain ranges known as oceanic spreading ridges. </em>

Hope this helps! :D 

Brainliest=Appreciated < 3

6 0
2 years ago
3. In tropical regions,
marin [14]

Answer:

a, a permanent thermocline traps nutrients in the deep water

b. primary productivity is high all year round, because there is a constant supply of solar energy for  photosynthesis.

Explanation:

Thermocline occurs in the tropical regions because the temperature is very high which warms the upper layer of water bodies whereas the lower layer of water has low temperature due to no sunlight. The primary productivity is high all year in the tropical regions, because there is a constant supply of sunlight that is needed by the plants for  preparing their own food.

3 0
2 years ago
Pay for the right to use it.<br> 30.<br> How can Celera make a profit off of sequencing our DNA?
Shtirlitz [24]

Answer:

Charge us

Sell the info

Explanation:

They can first charge individuals to use the services. For example, similar to 23andme or Ancestry, who provide a service of telling you interesting things related to your health or ethnicity.

They could also sell that data to pharmaceutical companies or other research groups who can use the DNA information for research. The more samples of DNA we have sequenced, the more information scientists have to work with and design drugs and more.

4 0
3 years ago
Which of the following solutions would have the lowest freezing point? 1.0 M NaCl, 3.0 M NaCl, 2.0 M NaCl, 2.0 M NaCl, 0.5 M NaC
Nady [450]
0.5 NaCI or 1.0 NaCI
8 0
3 years ago
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