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damaskus [11]
3 years ago
12

How contour farming can solve two environmental problems.

Biology
1 answer:
jasenka [17]3 years ago
3 0

Answer:

1. reducing soil erosion,

2.Controlling runoff water

Explanation:

Contour farming mitigates the impacts of floods, storms and landslides on the crops by reducing soil erosion up to 50 percent, controlling runoff water, increasing moisture infiltration and retention and thus enhancing soil quality and composition

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Why is variety in crop plants important for food security?
aev [14]

Answer:

Disease and Famine

Explanation:

If there is a disease that affects a type of plant, having other types of crops to rely on could save one from starvation. Also, only planting one crop in an area can change the pH and nitrogen levels in negative ways, so that eventually no plants can grow there. Not to mention the obvious balanced diet needed for a healthy body.

4 0
2 years ago
Question 9 of 25
tatuchka [14]

Answer:

b

Explanation:

the worm is living while the leaf is not

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The head of a phospholipid interacts with water because it is
Delvig [45]
Hydrophilic

A phospholipid is comprised of a phosphate hydrophilic head, which means that it is "water-loving," and a fatty acid hydrophobic tail, which is "water-hating." The head and the tail are joined together by a glycerol molecule. 

The phosphate head is attracted to water because it is charged (i.e. negatively). Water is a polar molecule, which means that there is an uneven distribution of charges within its molecular structure with the oxygen side being "more negative" than the rest of the atom (which is "more positive" near the hydrogen). Thus, the negatively-charged nature of the phosphate head and the parts of the water molecule which are positively charged enable the two to form an "attraction" towards one another. 

On the other hand, the hydrophobic tail is nonpolar, which means that it does not have a "more positive" or "more negative" side or part in its molecular structure. These differences in structure with water make the hydrophobic tail unattracted to water molecules and more attracted to other uncharged, nonpolar molecules (such as fats and oils).  
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3 years ago
Which scenarios are examples of physical changes? Check all that apply
egoroff_w [7]
Chewing bread, tearing paper, breaking rocks
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3 years ago
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What is the general term used to describe a group of diseases in which intestinal uptake of nutrients is impaired?
loris [4]

The term used for the condition, in which the uptake of nutrients from the small intestine is impaired is malabsorption.

The malabsorption is a condition, in which the small intestine walls become unable to uptake the nutrients in the blood. This condition can be caused by many different reasons, which affect the wall of the intestine. These conditions include infections, trauma, celiac disease, and surgery. Some diseases such as Crohn's disease, pancreatitis (chronic), or cystic fibrosis is also responsible for the malabsorption.

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