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ddd [48]
3 years ago
6

Organic matter in soil is also called _____.

Biology
2 answers:
Feliz [49]3 years ago
8 0

Answer: humus

<em>- Prodixy</em>

9966 [12]3 years ago
7 0

Answer:

The correct answer would be humus.

Humus is the organic material of the soil formed by the decomposition of the dead plants and animals. It is thick and dark in color (brown or black) and can also be produced by the process of composting.

It is very for the soil as it adds moisture to the soil, enhances the structure of the soil which increases the aeration and drainage.

It favors the growth of organisms (such as earthworm) helpful for the growth of plants and adds lots of nutrients to the soil, specially nitrogen.

In contrast, loam is a type of soil which is composed of silt, sand, and clay in 40-40-20 ratio. Regolith referred to the superficial layer covering the solid rocks or bedrock. It is formed by the accumulation of soil, dust, broken rocks etc on the bedrock.

Lastly, talus referred to the slope which is formed by deposition of shattered rock debris at the base of a cliff.

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How does soil form from bare rock?
icang [17]
The rock erodes over time and creates soft, supple material which we refer to as soil
5 0
3 years ago
What is the importance of having the US Forest Service, the Bureau of Land Management, the US Fish and Wildlife Service, and the
slavikrds [6]

Answer:

The importance of having the US Forest Service, the Bureau of Land Management, US Fish and Wildlife Service, and the National Park Service is to manage land resources for conservation and the development of natural resources.

Explanation:

The US Bureau of Land Management was mainly established to manage lands for different uses;

The US Forest Service was established to sustainable management of forest resources vis a vis conservation and sustainable usage;

The US Fish and Wildlife Service was established to conserve and protect wildlife/fishes with end goal being in the benefit of the populace;

The National Park Service was established to oversee all the National Park Systems and ensure that their intensities are maintained for the continuous enjoyment, entertainment as well as education of the masses.

If the main aim of establishing each body is examined closely, it would be discovered that their primary function is to manage land resources, conserve biological diversity and the environment's integrity as well as oversee the use of land and the resources it contains.

 

8 0
3 years ago
Read 2 more answers
Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium woul
Arte-miy333 [17]

Answer:

  1. Calcium binds to troponin C
  2. Troponin T moves tropomyosin and unblocks the binding sites
  3. Myosin heads join to the actin forming cross-bridges
  4. ATP turns into ADP and inorganic phosphate and releases energy
  5. The energy is used to impulse myofilaments slide producing a power stroke
  6. ADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filament
  7. ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle
  8. Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

Explanation:  

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing <u>calcium into the sarcolemma.</u> At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

4 0
2 years ago
Hunter-gatherer societies are often _____. permanent semipermanent very dense nomadic
zmey [24]

Hunter-gatherer societies are often nomadic. I believe.

8 0
3 years ago
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What causes genetic variation during human sexual reproductive processes?
Natasha2012 [34]
"Adjacent chromatids in homologous chromosomes cross over during meiosis in sperm and egg formation" is the one among the following choices that describes what <span>causes genetic variation during human sexual reproductive processes. The correct option among all the options given in the question is the second option.</span>
4 0
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