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stich3 [128]
3 years ago
7

First one who answers this will be marked brainliest, thanked, and 5 stars

Biology
2 answers:
Harrizon [31]3 years ago
8 0

the supercontinent is called pangaea that existed millions ago

dangina [55]3 years ago
6 0

Answer:

Option (2)

Explanation:

Alfred Wegener was the person who first introduced the concept of continental drift. It is this concept that helped in determining the past events that have occurred in the geological time scale.

With various shreds of evidence, Alfred Wegener concluded that the earth was initially comprised of a large supercontinent that got split up due to the drifting of the continents, which was later mentioned by the plate tectonic theory.

The Pangaea was first formed about 350 million years back and got separated into Laurasia and Gondwanaland about 180 million years back.

Thus, the correct answer is option (2).

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g If a colony of bacteria starts with 1 bacterium and doubles in number every 20 ​minutes, how many bacteria will the colony con
Lynna [10]

Answer: 2.81 x 10∧14 baterias after 16 hours.

Explanation:

Hi, first we have to find how many 20 minute intervals are in 16 hours.

If 1 hour = 60 min, 16hours = 960 minutes (16 h x 60 min / 1 h)

If we divide the 960 minutes (16 hours) by 20 minutes we obtain 48. (960/48)

There are 48 twenty minutes intervals in 16 hours.

Now we have to apply the exponential growth formula:

P (t) = Po (1 +r) ∧t

Where:  

P (t) = population at time t  

P (0) = initial population (1)

r = growth rate (1)

t = time (48)

Replacing with the values given:

P (t) = 1 (1 + 1) ∧48= 2.81 x 10∧14

2.81 x 10∧14 baterias after 16 hours.

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What protects the stomach from acidic gastric juices
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This might help,the presence of hydrochloric acid creates an acidic environment within the stomach that is needed to convert pepsinogen to pepsin. Mucus that is produced by the epithelial cells of the stomach help protect the lining of the stomach from the corrosive hydrochloric acid and pepsin.

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The correct answer is option b. "Alpha eventually replaced by theta".

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