<span>The answer is Due to heating of the air by the engine exhaust. Contrails are formed when the hot exhaust of the plane engines is rapidly cooled by the cold air in the upper atmosphere. The water vapor in the engine exhaust, formed in the combustion of fuel, freezes immediately to ice crystals due to the low pressure and -36oC temperatures in the 8000 m altitude in which the planes cruise. </span>
Hello LonelyPerson, to answer your question.
The Galápagos were officially annexed by Ecuador in February 12 1832 and were named "Archipelago del Ecuador.". It is still today officially a province of Ecuador. Ecuador claimed the <span>Galápagos Islands</span> just three years before their most famous visitor, Charles Darwin, dropped anchor on the Beagle and stepped ashore and into history.
Signed by, Virtuoso Sargedog
<span>1.<span>Understanding life. Primarily, studying biology gives you the essentials
and primal knowledge of life and how and what you can perceive from it, may it
be various fields of zoology, botany or anthropology, psychology, sociology and
etc. It lets you understand the different anatomies, physiologies and
behaviours on how they act independently, interact and influence one another. </span></span>
<span>2.Protecting life. It provides a sense of preserving life as your upmost
goal in studying biology. You came to an actualization to delve into this science
as to be a steward and a developer.</span>
<span>
3.Responsibility. It comes with ethics. You become concerned with how
actions of a certain populace of a species can affect the entire ecosystem.
Human behavior has massive effects to the biosphere.</span>
<span>4.Advancement. The improvement and enhancement on how we can preserve and
understand life and the human populace develop and utilize the earth without
damaging its vital components.</span>
<span>5.Involve in the current issues and participate. You can be part of a
responsible scientist and individual, a citizen of science to stop and help grow
the serious concerns of today’s abusive human behaviours and life-threating concerns.</span>
<span>i think this could help When the surface of the soil is frozen, most plants die because they cannot get water and nutrients from the soil because of their *structures* hint are too short to get past the frozen layer. What plant structure brings nutrients and water to the plant from the soil? </span>
