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mart [117]
3 years ago
15

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

Biology
2 answers:
Sonja [21]3 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]3 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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Which of these would be considered a transgenic organism? a human treated with insulin produced by E. coli bacteria a rat with r
MA_775_DIABLO [31]

Answer:

a rat with rabbit hemoglobin genes

Explanation:

When the genome of an organism is modified in the field of genetic engineering,by transplanting the gene(DNA) from one organisms to another,(by vectors) or alteration of the gene components,the resulting organism produced or formed is called Transgenic organism.

This process of genetic engineering makes use of recombination of genes to alter the genome of the transgenic organism.

Thus by transferring to  rat ( the DNA for Hb) as the  rabbit Hb,the gene( or genome) for producing Hb in tats has been modified by that of rabbit.Hence Rat is said to transgenic.

Besides animals crop plants are also genetically modified.Thus the genome of some crops are altered to resist herbicides and pesticides. Some species of rice (golden rice)have been  modified to  add certain  vitamins to improve the nutritional values.

Genetically modified bananas as edible vaccines are another example

3 0
3 years ago
Random changes in allele frequency in a population are called:
kogti [31]
Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency. 

All the other cases; answers, here aren't correct and don't apply. 
8 0
3 years ago
The EPA sets national air-quality standards for common air pollutants. The
fomenos

Answer:its " with monitoring, the concentration of every pollutant has decreased."

Explanation: just took it on Ap3x

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Where did Darwin say all living things came from?
nlexa [21]

Answer: Darwin had stated in The Origin of Species that “all the organic beings which have ever lived on this Earth may be descended from some primordial form”,

Explanation:

3 0
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How are sister chromatids related to one another?
BabaBlast [244]
Two identical copies formed by the replication of a single chromosomes
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