A and B smog is a type of air polution
Answer:
The H.M.S. Challenger embarked from Portsmouth, England on December 21, 1872 and changed the course of scientific history. Physicists, chemists, and biologists collaborated with expert navigators to map the sea. This interdisciplinary spirit has continued to the present day. During the 4 year journey, the voyages circumnavigated the globe, sounded the ocean bottom to a depth of 26,850 feet, found many new species, and provided collections for scores of biologists.
C. Wyville Thomson led the expedition but died of exhaustion from the journey, which ended on May 24, 1876. The Challenger had zig-zagged around the globe and had visited every continent, including Antarctica.
The reports of the Challenger expedition were supervised by Sir John Murray, whose biological conclusions were of great importance to the later development of marine biology. He concluded, for example, that the deep-sea fauna was not "ancient," in that it did not resemble the faunas found in ancient fossil deposits.
Explanation:
Answer:
Each trophic level represents the beings of an ecosystem and their amount of energy.
Explanation:
In a food chain, the highest energy level is made up of producers (e.g. chlorophyll plants), with the rest of the ecosystem dependent on their energy, captured from sunlight and stored in organic compounds.
The next trophic level belongs to primary consumers (herbivores) and then secondary consumers (carnivores).
From the producers, only part of the amount of energy is passed from one trophic level to the other, In other words, the higher the trophic level, the less energy is absorbed.
In an energy pyramid, each area is represented by a trophic level (from a food chain) of size proportional to its amount of energy.
The elements of the food chain are represented with the producers at the base (higher energy) and the consumers of each trophic level above.
As explained earlier, the amount of energy absorbed at the highest levels is low and therefore insufficient to support another trophic level.
as we all know , forests are filled with trees. and trees are helpful to us in many ways ,
they give us oxygen , wood , they are the main reason humans can actually survive on earth ... as the take in carbon di oxide and maintain the atmospheric balance on earth .
rubbers , papers , pencils are all impossible to make without trees .
thus trees and forests play an important role in human life and on earth
The cell membrane is what controls what goes inside and out the cell meanwhile the nuclear membrane <span>surrounds the genetic material and nucleolus in eukaryotic </span><span>cells. The advantages for the nucleus is that it controls the cell.
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