On steep slopes and mountains, ____ helps reduce erosion by creating level areas for crops.

Answers

Answer 1

Answer: The answer is terracing.

Terracing is a type of landscaping characteristic for steep slopes and mountains. Graduated terraces are used to farm on this kind of terrain to reduce erosion. This way crops are planted on graduated level areas and not on steep terrain, and risk of surface runoff is reduced.

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Charles Darwin did poorly in school as a young boy. How did his poor performance belie his genius?

Answers

Charles Darwin always had a taste for natural history as a kid, as far back as eight, in spite of how he performed in school. When he was a young adult, he got an apprentice ship as a doctor from his father who was also a doctor. This gave him experience with the anatomy of the human body. When being a doctor started to bore him, he learned taxidermy, exposing him to the anatomy of wild animals. Later he joined the Plinian Society which was a student natural history group that often debated and questioned the current topics and views of the subject in that time. Not too mention the many natural historians and evolutionists who also inspired him, one of which was his own grandfather,that gave him the support he needed. I guess that even though his normal school curriculum did not interest him, his self determination was enough to keep him grounded to his interests, proving that sometimes a great education doesn't always make you a genius. (idk :) Charles Darwin was smart in his own ways.

Location A receives nearly 200 cm of rain each year,while Location B receives only 30 cm.Why does Location A gets so much more rain?

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The reason for this is because both location varies in their Climate.

The Locations A receives about 200 cm of rain each year which is probably they have a tropical climate compare to Location B which only receives 30 cm of rain in a year is more likely have a moderate climate. Climate refers to the weather statistic of a location.

Down’s syndrome results from people having an extra copy of chromosome 21 in their cells as shown here. People with Down’s syndrome have both a lower IQ and a shorter life expectancy than those without Down’s syndrome. This is an example of

Answers

The answer is trisomy 21.

Trisomy 21 is a condition in which an extra copy of chromosome 21 is present. Instead of two chromosomes 21 in a cell, there are three chromosomes. This is a consequence of a failure of chromosome 21 to separate during the gamete development. Thus, an egg cell or a sperm cell will have two instead of one chromosome 21 and after a cross with normal gamete cell, a zygote will have three chromosomes 21.

D) changes in chromosomes leading to changes in cell processes.

Not an ultimate goal if science

Answers

What is not the ultimate goal of science is to produce unchanging and absolute answers . Scientists would like to, however, understand patterns, give explanations for natural events, and even make predictions.

And it isn't really the case that they would like to produce unchanging answers.

Which of the following is not a characteristic of metals?-high luster
-conducts electric current
-forms crystalline solids
-brittle

Answers

The right option is; Brittle

Metals are substances or chemical elements that form a metallic bond with other metal atoms. Metals are usually lustrous, ductile, opaque, malleable, and good conductors of heat and electricity. Metals form crystalline solids at room temperature and they are not brittle. Examples of metals include copper, silver, iron, mercury and sodium.

Brittle is not a characteristic of the metals.

Further Explanation:

Metals are chemical substances that are inorganic in nature. The most abundant possess are sodium, magnesium, iron, aluminum, and calcium. The copper, platinum, silver, gold not readily react with other elements so they are present in free-state. The characteristics of metal are:

High conductivity

Malleable

Ductile

Hard

Metals are mainly crystalline in nature. The crystal structure of metals is very simple with a relatively high degree of symmetry. The metal reacts readily with other non-metal. The reactivity of metals are different from each other, lithium and potassium are highly reactive metal compound. The platinum, palladium, gold, and silver are very low reactive compounds. The metals are usually malleable and ductile in nature that means they can be transformed into wire and sheet. The brittle substances do not possess these characteristics and therefore, brittleness is not a characteristic of metals.

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