Tillage is a threat to the soil because it ruins the protective topsoil. hope it helps :)
<span>The study of how traits are inherited though the interaction of alleles is defined as genetics and it began in the 1850's. Gregor Mendel was the first scientist to study genetics. </span>
Answer:
This question is incomplete, because there is no picture, but I attached one, related with the question. The correct answer Trade winds are shown as number 1.
Explanation:
Trade winds and permamnet winds which blow between Tropic of Cancer, Equator and Tropic of Capricorn (which is between 30 degrees N and 30 degrees S.
These wind always flows from Tropics towards the Eqautor, because around the Eqautor is permanent low pressure area, and around the Tropics is permanent high pressure area. Air always flows from high pressure towards low pressure area.
Due to Earth's rotation trade winds curve a little bit, a they become prevailing Northeasterly Trades (in Northern hemisphere) and Southeasterly Trades (in Southern hemisphere). Earth rotates in west-east direction, and that is the reason for their deflection.
Trade winds got their name in the Age of Discovery (14-15 century) when sailing around the world and explorations were very common. Explorers find out that in specific regions exist winds with permanent direction. That was very importnant in the Middle Ages, so explorers always followed their patterns. Term '<em>trade</em>' is actually from Middle English and it means '<em>track</em>'.
If not for the Earth's rotation, global winds would blow in straight north-south lines. ... The Coriolis effect influences wind direction around the world in this way: in the Northern Hemisphere it curves winds to the right; in the Southern Hemisphere it curves them left. The exception is with low pressure systems.