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DIA [1.3K]
2 years ago
15

Describe the order of how living things arose based on the geologic timeline?​

Biology
1 answer:
Anastasy [175]2 years ago
8 0

Answer: Geologists and other Earth scientists use geologic time scales to describe when events happened in the history of Earth. The time scales can be used to show when both geologic events and events affecting plant and animal life occurred. The geologic time scale pictured below (Figure below) illustrates the timing of events like:

Earthquakes.

Volcanic eruptions.

Major erosion.

Meteorites hitting Earth.

The first signs of life forms.

Mass extinctions.

Explanation:

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Which two events occur when gravity causes a nebula to collapse into itself?
blsea [12.9K]

The two events that occur  when gravity causes a nebula to collapse into itself are:

A. Nuclear fusion start.

B. A new star forms.

Explanation:

  • Nebula are giant clouds of dust and gases.
  • These clouds are considered as progenitors of stars and planets.
  • The gravitational pull within these giant clouds result these large masses to collapse towards their centre.
  • The gravitational collapse results in tremendous rise in temperature till a point where nuclear fusion begin .
  • The stars are born out of such mechanism and act as a source of heat and light in universe.
3 0
3 years ago
The forward and reverse PCR primers used for the amplification of a VNTR locus on chromosome number 4 are 20 bases and 21 bases
zimovet [89]

The repeats which occur together on a chromosome are referred to as VNTR. The length of each repeat is 60bp.

The first primer is 20bp and is 53 bp away from 1st repeat. Therefore, the total length of sequence amplified by the first primer till 1st repeat = 20+53 = 73bp. Beyond this point 6 repeats on 60 bp are present, hence, the length becomes = 73 + (60X6) = 433bp.

Now the reverse primer which is 21bp in length is located 28bp from the repeat on its side. Reverse primer comes from the opposite direction, so it must be present after the 6 repeats.

The total length of the amplified region = 433 + 28 + 21 = 482 bp.

5 0
3 years ago
Where in water is being converted into a gaseous form?
DiKsa [7]

Answer:

evaporation

Explanation:

all the others have a completely different meaning

hope it helps, pls mark me as brainliest

7 0
3 years ago
What does a target cell require to respond to an extracellular signal molecule?
zaharov [31]
A specific protein called a receptor
7 0
3 years ago
GUYS PLEASE HURRY!! I need this finished in 20 mins :/ i missed a day. Im offering 100 brainly points
Andru [333]

Answer:

A.

1. energy

2. nutrients

3. calories, water

4. metabolic rate

5. nutrients

6. weight and height

B.

1. protein, amino acids

2. viruses

3. carbohydrates, energy

4. fibers, glucose

5. fats

a. molecular

b. 'healthy'

Explanation:

please give me brainliest and you're welcome

7 0
3 years ago
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