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sleet_krkn [62]
3 years ago
6

How many flu pandemics have occurred since 1918? A. 4 B. 5 C. 6 D. 7

Biology
2 answers:
maria [59]3 years ago
4 0

There has been 4 flu pandemics.

Lubov Fominskaja [6]3 years ago
4 0

Since 1918, there have been five flu pandemics.

Hope you get it right !

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A farmer decides to go into the business of raising trout for tourists who enjoy fishing. She builds six trout ponds and stocks
Nastasia [14]

Yes the following statements about her trout is likely true Because the ponds are different and the populations are likely to experience different mutations, the populations will likely diverge evolutionarily, but only over many generations.

Explanation:

The effect of genetic drift can be seen in all populations but the most is seen in small population. The change in allele frequency due to the sampling error would lead to evolution of the species.

Bottleneck effect is when a population gets reduced due to some natural disaster. Her friends were not right about bottleneck effect.

So it is clear that no bottleneck effect will occur as each pond have different chance or rate of mutation and the change in alleles will be different. The  trouts will evolve independently in the different ponds and pass on the traits to their progeny.

Genetic drift does not take into account for the harm or benefit of the alleles that are passed on.

5 0
3 years ago
PH scale *
kondor19780726 [428]

Answer:

d

Explanation:

measures hydrogen ion concentration

The pH of a solution is a measure of the concentration of hydrogen ions in the solution. A solution with a high number of hydrogen ions is acidic and has a low pH value. A solution with a high number of hydroxide ions is basic and has a high pH value. The pH scale ranges from 0 to 14, with a pH of 7 being neutral.

5 0
2 years ago
4. Floating algae called Phytoplankton is a
Scilla [17]

Answer:

In a balanced ecosystem, they provide food for a wide range of sea creatures.Phytoplankton, also known asmicroalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow.

6 0
3 years ago
Once a compromised system is disconnected, it is safe from further damage.
butalik [34]
I think the right answer is that it's "false"
5 0
3 years ago
Comparable segments of the mitochondrial DNA sequences of two similar species are shown below. This segment of DNA mutates at a
tangare [24]
99million years ago, so the answer is C


4 0
3 years ago
Read 2 more answers
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