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inn [45]
2 years ago
12

When a plant cell in normal water is moved into a 20% salt solution, the cytoplasm and vacuole of the plant cell shrink. the rea

son for this change is:?
Biology
1 answer:
son4ous [18]2 years ago
5 0
The salt solution is hypertonic to the plant cells. water from the plant cells seeped out. plasmolysis apply
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A geologist is studying two different rhyolite flows to determine if they were erupted at the same time.
ss7ja [257]
Q1. The answer is 1.

It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


x = 50% = 50/100 = 0.5

n = ?

(1/2)ⁿ = 0.5

log((1/2)ⁿ) = log(0.5)

n * log(1/2) = log(0.5)

n * log(0.5) = log(0.5)

n = log(0.5)/log(0.5)

n = 1


Q10. The answer is 2.


It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


Rhyolite #2 has 25% of the parent H remaining:

x = 25% = 25/100 = 0.25

n = ?

(1/2)ⁿ = 0.25

log((1/2)ⁿ) = log(0.25)

n * log(1/2) = log(0.25)

n * log(0.5) = log(0.25)

n = log(0.25)/log(0.5)

n = -0.602 / - 0.301

n = 2



Q3. The answer is 100 million years.


A number of half-lives (n) is a quotient of total time elapsed (t) and length of half-life (H):

n = t/H

n = 1

t = ?

H = 100 000 000 years


n = t/H

t = n * H

t = 1 * 100 000 000 years

t = 100 000 000 years<span>

</span>

4 0
3 years ago
__________ death rates and __________ infant mortality rates are due in large part to technological advances, improved sanitatio
Elis [28]
<h2>Both are Lower</h2>

Explanation:

  • Death rate is also known as Mortality rate.
  • Death rate is the ratio of total deaths to total population in a specific area  or community over a specific time period.
  • Death rate = number of deaths/1000 of the population/year.
  • The death of young children under the age of 1 is known as Infant mortality rate.
  • The infant mortality rate (IMR) meausres the death toll which is the number of deaths of children under one year of age /1000 live births.  
4 0
3 years ago
Which of the following statements is correct?
telo118 [61]

The anwser should be B. Nonrenewable resources generally have a higher impact on the environmental than renewable resources.

4 0
3 years ago
Read 2 more answers
​Approximately what percentage of the body's energy needs at rest is supplied by fat
Ilya [14]
<span>The percentage of energy provided by fat when the body at rest is around 60%. The remainder of the energy provided to the body is from other nutrient sources, proteins and carbohydrates. The body uses these calories at rest for regular functions- respiration and other normal bodily processes.</span>
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3 years ago
Which of the following would cause an error in DNA replication?
GaryK [48]

Answer: I believe it is A. DNA polymerase checking the DNA

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