Answer:
Wheat was first domesticated in Mesopotamia because of a favorable climate and a great diversity of wild grains that led to crossbreeding of seeds.
Explanation:
Mesopotamia ( Western Asia )was the first place of domestication of wheat. The favourable climate of intense sunshine of old Western Asia-kuwait, Iraq,...) favours photosynthesis which ensure food production,
Besides the population of this region with wide grains, on hilly land, ensured cross pollination of these wide seeds grains with wheat varieties leading to hybridization, and selection by natural selection for domestication and eventual evolution.
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Answer:
It reduces strength.
Explanation:
It not desirable to produce concrete mixtures of a higher consistency than normal because the strength of the concrete decreases. Consistency plays an important role in the determination of strength of concrete. Less water than normal quantity in concrete increases the consistency but decreases strength due to incomplete chemical reaction while on the other hand, adding more water would increase water-cement ratio and reduces consistency as well as strength of the concrete so that's why necessary amount of water and cement should be added to get higher strength.
Answer:
B. by chatting with friends
C. by downloading violent or sexual content
Explanation: The immoderate use of internet can decrease Ryan's concentration for studying and lead him to explore deeper into the internet world. By having access to almost everything online, he can delve into online sexual content and develop interest in it. Since the content varies, it is most likely for Ryan to get attracted to violent content. Also, as a teenager, instead of using internet to gather information for a lecture or a test, he can quickly lose interest by being online with his friends constantly. Therefore, it is very important for parents to have some kind of control of the teenager's online surfing since it can deeply affect his concentration, mental health and view of sexual intercourse.
