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liubo4ka [24]
2 years ago
9

How many continets are found on Earth​

Biology
2 answers:
Ugo [173]2 years ago
8 0

Answer:

A lot

Explanation:

am playing there around 195 counties and 7 continets my bad

Oduvanchick [21]2 years ago
5 0

Answer:

There are seven continents in the world/on earth.

Explanation:

There are 7 total continents in the world, which are - Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America.

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In the peppered moth scenarios what is the variation? And the selection?
Morgarella [4.7K]

Variation is number of alleles for the wing color of the peppered moths. The wing color ranges from pure white to pure back.

Selection pressure is predation by birds.

Explanation:

In the wake of the industrial revolution, white-winged peppered moths had a large allelic frequency in the population compared to black-winged peppered moths. However, when the environment changed due to soot produced by industries (making the environment darker) white-winged peppered moths reduced while that of black moths increased.

This is because black moths were able to blend in and camouflage in the dark environment than white-winged peppered moths that stood out to their predators. Black moths, therefore, had an increased chance of reaching adulthood and passing their genes to the next generation. This increased the allelic frequency of black-winged peppered while that of white-winged moths reduced in the population.

Learn More:

For more on natural selection of peppered moths check out;

brainly.com/question/12918325

brainly.com/question/9231156

#LearnWithBrainly

8 0
3 years ago
if an element has a half-life of 30 million years and there is 12.5% of it remaining in a rock, how old is that rock
Assoli18 [71]

Answer:

The half-life of a substance is the amount of time it takes for half of that substance to decay. However, after two half-lives, half of the half remaining will decay, leaving you with one quarter of the original substance.

So, after 1 million years you will have 50% of the original substance remaining.

And, after 2 million years you will have 25% of the original substance remaining.

After 3 million years you will have 12.5% of the original substance remaining.

And after 4 million years you will have 6.25% of the original substance remaining.

Explanation:

Hope it helps:)

3 0
3 years ago
What is the starfish experiment?​
vitfil [10]

Answer:

When starfish were removed from their environment, the species richness of that area went down. This was because the starfish ate the mussels, and when the starfish were removed, the mussels became abundant and preyed on many of the other species.

This experiment showed that the starfish were a keystone species. A keystone species is a species that has a low biomass but a large impact on the community they are living in.  

6 0
3 years ago
Present state and current conditions of the atmosphere.
sergejj [24]

Answer:

weather

Explanation:

8 0
3 years ago
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Which statements about the fluid mosaic structure of a membrane are correct? Select the three correct statements.
jeka57 [31]

The correct statements are:

1. The framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.

2. The diverse proteins found in and attached to membranes perform many important functions.

5. Because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.

6 0
3 years ago
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