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WITCHER [35]
3 years ago
5

Which layer forms the largest portion of Earth?

Biology
2 answers:
ICE Princess25 [194]3 years ago
8 0
The mantle is the largest portion of the earth.
weqwewe [10]3 years ago
3 0

Answer:

The correct answer is mantle.

Explanation:

The Earth is formed of four distinct layers. The crust refers to the layer, on which we live, the mantle is much hotter and possesses the tendency to flow, and the inner core and the outer core. The crust is the thinnest layer in comparison to the other three layers, that is, it is only about 3 to 5 miles thick underneath the oceans, and about 25 miles thick underneath the continents.  

Mantle refers to the layer, which is situated directly underneath the sima, that is, the lower layer of the Earth's crust and is the largest layer of the planet, that is, about 1800 miles in thickness. This section of the Earth comprises very hot and dense rocks. The temperature of the mantle differs from 1600 degrees F at the top to about 4000 degrees F close to the bottom.  

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Describe respiration in frog and tadpole​
adell [148]

Answer:

Frog - The frog has three respiratory surfaces on its body that it uses to exchange gas with the surroundings: the skin, in the lungs and on the lining of the mouth. ... A frog may also breathe much like a human, by taking air in through their nostrils and down into their lungs.

Tadpole - Tadpoles open their mouths as they swim and take in water. As the mouth closes, muscles transfer the water to the gills. These consist of thin membranes called lamellae, which take oxygen from the water where it enters the blood stream through the process of diffusion.

4 0
3 years ago
We know that not all cells are alike. Which is NOT a true statement about the difference between cells?
____ [38]
Most cells have a membrane, though some don't.
8 0
3 years ago
A local restaurant has recorded the demand for bottled water in each of the last 15 months of business. Use the recorded demand
matrenka [14]

Answer:

4813.10

Explanation:

the demand for bottled water for the last 15 months of business is as follows;

Period Demand

1 4516

2 4769

3 4814

4 5958

5 5284

6 5267

7 5083

8 4689

9 5321

10 5475

11 5489

12 5942

13 5616

14 4785

15 4675

the forecast for period 16 using the three-period weighted is

Weighted MA(3) = Ft₊₁ = wt₁(Dt) +wt₂(Dt₋₁) +wt₃(Dt₋₂

the weighting scheme to be used to forecast the period 16 are 0.5,0.4 and 0.1

Weighted MA(3) = F₁₆= 0.5(4675)+ 0.4(4785) +0.1(5616)   =2337.50+1914+561.60 =4813.10

5 0
4 years ago
30POINTS AND BRAINLEST
SCORPION-xisa [38]

Answer:

We are losing Earth's greatest biological treasures just as we are beginning to appreciate their true value. Rainforests once covered 14% of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.

One and one-half acres of rainforest are lost every second with tragic consequences for both developing and industrial countries.

Rainforests are being destroyed because the value of rainforest land is perceived as only the value of its timber by short-sighted governments, multi-national logging companies, and land owners.

Nearly half of the world's species of plants, animals and microorganisms will be destroyed or severely threatened over the next quarter century due to rainforest deforestation.

Experts estimates that we are losing 137 plant, animal and insect species every single day due to rainforest deforestation. That equates to 50,000 species a year. As the rainforest species disappear, so do many possible cures for life-threatening diseases. Currently, 121 prescription drugs sold worldwide come from plant-derived sources. While 25% of Western pharmaceuticals are derived from rainforest ingredients, less that 1% of these tropical trees and plants have been tested by scientists.

Most rainforests are cleared by chainsaws, bulldozers and fires for its timber value and then are followed by farming and ranching operations, even by world giants like Mitsubishi Corporation, Georgia Pacific, Texaco and Unocal.

There were an estimated ten million Indians living in the Amazonian Rainforest five centuries ago. Today there are less than 200,000.

In Brazil alone, European colonists have destroyed more than 90 indigenous tribes since the 1900's. With them have gone centuries of accumulated knowledge of the medicinal value of rainforest species. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.

Most medicine men and shamans remaining in the Rainforests today are 70 years old or more. Each time a rainforest medicine man dies, it is as if a library has burned down.

When a medicine man dies without passing his arts on to the next generation, the tribe and the world loses thousands of years of irreplaceable knowledge about medicinal plants.

Explanation:

5 0
3 years ago
As the human population spread out of Africa into new regions, genetic diversity Group of answer choices went up as an adaptatio
nika2105 [10]

Genetic diversity decreased as the human population migrated from Africa to other continents because each migration had a chance to obliterate one or more genetic variants.

<h3>What is genetic diversity?</h3>

The term "genetic diversity" refers to the entire gene pool that a population or species possesses in a specific habitat.

During migration, genetic diversity is essential for adjusting to new environmental situations.

The genetic diversity decreased when the human population migrated from Africa to other continents since each migration had a chance of bringing with it one or more genetic variants.

For more information regarding genetic diversity, visit:

brainly.com/question/1446827

#SPJ1

8 0
2 years ago
Read 2 more answers
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