In which way is primary succession similar to secondary succession?

a. both occur where life already exists.
b. both are gradual.
c. both occur where no life exists.
d. both involve creating soil.

ANSWER:

that would be C. bc they both begin where no life exists

primary succession begins where no sign of life or soil is found.

secondary succession is where there is no sign of life, but soil is found.

~batman's wife

C.Both occur where no life exists.

Explanation:

An ecological succession involves changes in the biotic community of the ecosystem with respect to the changes occurring in the non-living factors of the ecosystem such as temperature, water, sunlight and calamity in a due coarse of time until the ecosystem attains stability.

A primary succession occurs in a region where no living species previously existed. It occurs in a region of retreating glacier and sites of volcanic eruptions. The region get colonized by the living species when the conditions of the environment becomes favorable.

A secondary succession occurs in a region where a region was previously occupied by the living species but the region was disturbed by the natural or man made disaster. The region will get recolonized due to the presence of precursors of life like left over seeds, stems and roots which can give birth to new plant colony.

On the basis of the above explanation, the primary succession is similar to secondary succession in a sense that both successions can occur in a land where no life exists.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).