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NemiM [27]
3 years ago
6

Specialized cells in plant roots ensure that they grow down into the soil to find water and nutrients. This plant response by sp

ecialized cells is called
Biology
1 answer:
poizon [28]3 years ago
6 0
The answer would be mutualism 

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¿Es normal el efecto invernadero?
kipiarov [429]

Answer:

i think it is

Explanation:

its because greenhouse effect is a natural process which warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.

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3 years ago
What source of energy is needed to refine petroleum? Solar Wind Heat Nuclear
Keith_Richards [23]
I believe that the right answer is Heat energy
7 0
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Blood is pumped to the lungs where carbon dioxide leaves the blood and oxygen enters the blood.
Lerok [7]
I think its pulmonary circulation too.
3 0
3 years ago
While alive, an organism absorbs (radioactive) carbon 14 at such a rate that the proportion of carbon 14 in the organism remains
Inga [223]

Answer:

The person has been dead for approximately 15,300 years

Explanation:

<u>Available data</u>:

  • The half-life of carbon 14 is 5,600 years
  • The human skeleton level of carbon 14 is 15% that of a living human

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

  • C14 T₀ ⇒ Amount of carbon in a living body at time 0 = 100%
  • C14T₁ ⇒ Amount of carbon in the dead body at time 1 = 15%
  • λ ⇒ radioactive decay constant = (Ln2)/T₀,₅
  • T₀,₅ ⇒ The half-life of carbon 14 = 5600 years
  • T₀ = 0
  • T₁ = ???

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5600

λ = 0.000123

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (15%/100%) = Ln 0.15 = - 1.89

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 1.89 = - 0.000123 x T₁

T₁ = - 1.89 / - 0.000123

T₁ = 15,365 years

The person has been dead for approximately 15,300 years

4 0
3 years ago
Crude oil is turned into usable forms of energy in a ______.
iren [92.7K]

Answer: C) Turbine

Explanation: Crude oil is turned into usable forms of energey by a Combustion Turbine. Hope this helped!  

5 0
2 years ago
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