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podryga [215]
3 years ago
5

Nearly one billion dollars a year are spent on clearing sediment from streams and lakes in the United States.

Biology
2 answers:
Mrac [35]3 years ago
5 0
The answer is C) Hill areas where protective vegetation has been removed....

Novosadov [1.4K]3 years ago
3 0

Answer: <u>Option C </u>

<u>Explanation</u>: Hills are the most common source of sediments because they lack vegetation. Plants and trees hold the soil and thus prevent erosion of soil layer with water. The sediments from the hilly areas get carried by rain water or runoff, and add to the water bodies, like lakes and streams.

Waste from mining industries don’t have sediments in their waste, so option B is incorrect.

Option A is incorrect because over-irrigation will not affect the soil layer, as it is firmly held by the roots of the crops.

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Answer is option A.

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6 0
3 years ago
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If a tree has 24 light rings and 24 dark ring how old is it
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the tree is 24 years old. The inner part of the stem of the tree has a part referred to as cambium. Each year cambium produces high number of cells with thin cell walls when tree is highly active. These cells form the light-colored  rings. When tree is less active cambium synthesizes few small cells with thick walls. The region occupied by these cells appear as a darker ring on the cross section of the stem. These two processes occur in the same year and as result each growth year is characterized by a ring consisting of a light and dark parts.  
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4 years ago
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just olya [345]

Answer:

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7 0
3 years ago
Which is more important: species richness or species evenness?
Alex Ar [27]

Answer:

Honestly i think that its Richness because its good to have a good amount of different species so that there is a good number of animals to create a food chain. The amount of animals in a population is important but its more important to have a variety of different animals so that all the populations have other animals to eat or survive off of.

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3 0
3 years ago
In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mend
Hunter-Best [27]

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