mount saint helens erupted several times between may and august 1980 what lesson did the eruptions teach scientists

1 answer:

3 0

The eruption of Mount St. Helens provided a prospect for the scientists to examine the effects of the catastrophe. In the eruption, the losses were tragic, however, after the incident, the geologists hugely bettered their tendency to determine eruptions, by safely evacuating thousands of Filipino people prior to the eruption of Pinatubo in 1991.

Scientists also started to learn various other valuable lessons, even some of them have defied the fundamentals of evolutionary thinking. The eruption of 1980, offered a natural laboratory for comprehending that how quickly the catastrophic procedures can reshape the globe, and how briskly wildlife can recover.

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Which of the following does NOT describe a multicellular exocrine gland?

g100num [7]

The correct answer is hormonal glands

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Microscopic plants called algae grow inside the top layer of sea ice in the Antarctic if enough sunlight reaches that layer of i

MrRa [10]

Answer:

The correct answer is: (A).

Explanation:

In the question, it is mentioned that the algae can grow under the conditions of "enough sunlight" and "enough nutrients".
Sunlight reaches the algae, by first falling on the surface made up of ice and snow and then refracting from there into the top layer of the ice where the algae grows.
However, the capability of both snow and ice to reflect sunlight is far more than that of refracting sunlight.
Therefore, the amount of light received by the algae is similar in absence or presence of the layer of snow on the top layer of ice.
However, on deposition of snow on the layer of the ice, the weight of the ice increases and it sinks below into sea water.
This allows more nutrient rich sea water to percolate into the ice and reach the algae.
The algae receive more nutrients from the sea water and hence is capable undergoing better metabolism and growth.
Hence, more algae are produced under such a situation.