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anyanavicka [17]
3 years ago
10

What stimulates a skeletal muscle cell to contract?.

Biology
1 answer:
mars1129 [50]3 years ago
5 0
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.
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1. How many pounds of biological material is below that soil surface?​
Stella [2.4K]

Answer:

The amount of organic matter in mineral (sand, loam or clay) soils ranges from very low being 1% by weight, to average being 2 to 4%, and high being greater than 5%. There are also “muck” or organic or peat based soils that are 30 to 40% organic matter. The general consensus is the more soil organic matter the better.   approximately 45%

Soil Composition

The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.

Explanation:

8 0
3 years ago
How can local environmental changes have global effects?
Alex777 [14]

Answer:

D

Explanation:

Water and air circulate around the world in water currents and wind systems (like prevailing winds) respectively, hence distribute energy and whatever else they are carrying across the globe. This is why polluting the oceans in the equatorial region will have indirect consequences for marine life in the poles.

Pollution of air through emission  of greenhouse gases in one part of the globe will contribute to global warming across the world because these emissions will be carried around by prevailing winds and diffuse across the atmosphere.

Global warming also causes climate change that subsequently causes the displacement or migration of organisms when this change in climate is unfavorable  

6 0
3 years ago
Read 2 more answers
The actual niche the organism is able to occupy in the presence of competitors is called its:_____________.
ladessa [460]

Answer:

B) realized niche

Explanation:  

The ecological niche refers to all the environmental factors that influence the growth, survival, and reproduction of species. These factors also include the interaction between species. The term ecological niche refers to the fundamental niche or the realized niche.    

  • The fundamental niche refers<u> only</u> to factors or physical conditions under which a species can live and survive in the <u>absence of any interaction with other species. </u>
  • The realized niche refers to the restricted conditions in which a species can live and survive as a result of <u>environmental conditions and the interaction with other species</u><u>. </u>

When an inferior competitor is excluded by the superior competitor, this is known as competitive exclusion. This occurs when there is not habitat differentiation, and both species can not share the same niche. In this case, the effective or realized niche of the dominant species completely occupies the fundamental niche of the inferior competitor.        

 In the exposed example the organism is able to occupy a niche in the presence of competitors, which is the clue for us to classify this niche as a realized niche. The organism needs to interact in a certain way with its competitors. There is an interaction between taxonomic groups, or between individuals.

6 0
3 years ago
Which of the following statements describes what occurs with energy as a result of the law of conservation of energy
antiseptic1488 [7]

The amount of energy before a process occurs is equal to the energy after the process occur.

4 0
3 years ago
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The passing of specific traits that help an individual reproduce and survive is called what?
storchak [24]
I think its autotrophs and asexual 
ex... autotroph- plants  asexual- penguins
8 0
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