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Hunter-Best [27]
3 years ago
6

Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor which would be resp

onsible for this evolutionary change
Biology
1 answer:
skad [1K]3 years ago
7 0

Answer: don’t know really how to explain it but it’s geographic isolation

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5. Which of the descriptions below best describes photosynthesis?
Ganezh [65]

Answer:

i think d but not too sure.

Explanation:

I think it is either d or b but pretty sure d

5 0
3 years ago
Which of these is part of a feedback loop that results in a cooling effect on Earth?
irga5000 [103]

Answer:

B. As snow and ice melt, the underlying surfaces absorb heat from solar radiation

Explanation:

Which of these is part of a feedback loop that results in a cooling effect on Earth as snow and ice melt, the underlying surfaces absorb heat from solar

8 0
3 years ago
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A paleontology student plans to compare the genomes of fossilized marine organisms from Africa and North America to identify how
Shalnov [3]
Based on that scenario, a faulty reasoning that the student's research advisor most likely point out is : The rock that makes up the fossils replaced the organisms tissue and genetic material,

Because of this , their genomes can't be extracted.

hope this helps
8 0
3 years ago
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Geneticists have determined that the majority of individuals in an isolated island population have blood type
oee [108]

Question continuation;

..........type B. Type A is found to be more common in the mainland population from which the island was settled.

How could a geneticist best explain the dominance of blood type B in the island population?


Multiple choices;

A. Random mutations have occurred in the island population.

B. Genetic drift has reduced the frequency of type A individuals.

C. Natural selection has only occurred in the mainland population.

D. Environmental conditions on the island are less favorable for type B individuals.


Answer;

B. Genetic drift has reduced the frequency of type A individuals.


Explanation;

-Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance.

-It occurs in all populations of non-infinite size, but its effects are strongest in small populations.

8 0
3 years ago
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A drought decreases the water level in Lake Winnipeg. The carrying capacity of the lake decreases.
Tema [17]

Answer:

Water, fish

Explanation:

The limiting factors are the water of course and the organisms living in the lake.

7 0
3 years ago
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