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mart [117]
2 years ago
15

Hurry up please, due in 20 minutes, and please no links.

Biology
2 answers:
Sonja [21]2 years ago
8 0
Polar bear live on the ice caps and snow so the sea ice melting is basically the same as deforestation, they’re losing their homes and since this is also affecting the fish in the ocean they’re losing their source of food and etc. hope this helps :)
murzikaleks [220]2 years ago
4 0

Answer:

Every winter, Arctic sea ice grows around the pole, its frozen tendrils threading along northern coasts. Right now sea ice has just passed its peak coverage for the year, and will begin to shrink with the coming of spring. It’s a crucial time for polar bears, whose food supply is inextricably linked to sea ice.

And in recent decades, sea ice has been shrinking faster than ever. According to the National Snow and Ice Data Center, 2019 has the seventh-lowest sea ice cover in the Arctic since they began collecting satellite data 40 years ago.

This year “doesn't break any records, but it's the trend that matters,” says University of Alberta polar bear scientist Andrew Derocher. “The downward trend in Arctic sea ice across all months is the concern,” he says, and “now we wait to see what spring conditions bring.” (Read more about global warming’s link to polar bears.)

A cold spring allows ice to linger, giving polar bears easier access to one of their favorite foods: seals. A warm spring cuts short the availability of their food super-highway....

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Messages in your brain are transmitted by
Elza [17]

Answer:

D) Neurons

Explanation:

Your nervous system contains millions of nerve cells, called neurons. Neurons are highly specialised to transmit messages from one part of your body to another. ... Motor neurons, which pass instructions from your central nervous system to other parts of your body, such as muscles or glands.

4 0
3 years ago
which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in
Soloha48 [4]
(4) Oxygen would be the answer.
3 0
3 years ago
What is the symbol for aluminum
Digiron [165]

Answer:

Al

Explanation:

I found it online

8 0
2 years ago
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What trait is common for animals in the Order Carnivora?
stellarik [79]

Answer:

i would say claws, larger sharp teeth, and some my have camouflage in order to hunt better.

7 0
2 years ago
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Consider the following hypothetical population and compute the statistical measures below: #births = 50,000; #deaths = 10,000; #
777dan777 [17]

Answer:

The birth rate refers to an average number of births in one year per thousand individuals in the population at mid-year.  

BR = (total birth in an annum / total population in mid year) * 1000

BR = (50000 / 1000000) * 1000 = 50

Death rate refers to an average number of death in an annum per thousand individuals in a population at mid year. Thus,  

DR = (total death / total population in mid year) * 1000

DR = (10000 / 1000000) * 1000 = 10

Annual population growth rate or APGR is calculated as:  

APGR = (Birth rate - Death rate) / Death rate

APGR = (50 - 10) / 10 = 4.0 %

Doubling time is the whole sum time needed for a population to get double in size. It is calculated as DT = ln (2) / growth rate

70 / 4.0 = 17.5 years

Thus, population will get double in 17.5 years.  

Adjusted (true) growth rate is equal to APGR + (NMR / Death rate)

And NMR = [(immigrants -emigrants) / total population] * 1000

NMR = [(5000 - 20000) / 1000000] * 1000 = -15

Thus, Adjusted (True) growth rate = 4.0 + (-15 /10) = -6%

The adjusted (true) doubling time = ln (2) / Adjusted growth rate  

= 70 / -6 = -11.66

This negative sign shows that it will never get double in such situation.  

5 0
3 years ago
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