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Hoochie [10]
3 years ago
5

"Spent" nuclear fuel rods come out of a reactor and need to be handled carefully. Why must power plants spend so much money and

be so cautious in dealing with these materials?
Biology
2 answers:
Gnoma [55]3 years ago
8 0

Answer:

    Nuclear energy, also called atomic energy, is obtained from the fission of the enriched uranium atom nucleus, releasing a large amount of energy. Nuclear energy holds together the nucleus particles of an atom. The division of this nucleus into two parts releases a large amount of energy.

    This energy source is responsible for much controversy and distrust: the lack of security, the disposal of atomic waste, and the possibility of accidents in the plants, cause the disapproval of the use of nuclear energy by most of the population.

Disadvantages of nuclear power (if not handled with extreme caution)

  • Waste produced by nuclear energy is very dangerous.
  • For both health and the environment in general. Radioactive waste is very polluting, deadly and takes thousands of years to degrade, which makes its management very delicate. In fact, it's a problem we haven't solved yet.
  • Accidents can be very serious.
  • Nuclear power plants are equipped with great safety measures, but accidents can occur and in this case they can be very serious.
  • For both natural disasters and terror acts, a nuclear power plant is a target that can do enormous damage if it is destroyed or damaged.

Leni [432]3 years ago
4 0
The rods originally contain the fuel for nuclear reactions, which mean they are highly radioactive. The radiation they emit is very dangerous and harmful to all types of life; therefore, they must be handled with care and disposed of properly to minimize damage because of them.
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Which of the following is used to break things down and dispose of?
sammy [17]

Answer: Lysosomes

Explanation:

A lysosome is a membrane-bound cell organelle that contains digestive enzymes. ... They break down excess or worn-out cell parts.

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3 years ago
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6 0
3 years ago
The Offspring produced by a cross between two given types of plants can be any of the three genotypes denoted by A, B, and C. A
ratelena [41]

Complete question:

The offspring produced between two given types of plants can be any of the three genotypes, denoted by A, B and C. A theoretical model of gene inheritance suggests that the offspring of types A, B and C should be in a 1:2:1 ratio (meaning 25% A, 50% B, and 25% C). For experimental verification, 100 plants are bred by crossing the two given types. Their genetic classifications are recorded in the table below.

<em><u>Genotype       Observed frequency</u></em>

    A             →        18 individuals

    B             →        55 individuals

    C             →        27 individuals

Do these contradict the genetic model?  

Use a 0.05 level of significance.

Determine the chi-square test statistic.

Answer:

Do these contradict the genetic model? No, according to the chi-square test, there is not enough evidence to reject the null hypothesis of the population being in equilibrium.  

Explanation:

<u>Available data</u>:

  • Crossed genotypes: two
  • Genotypes among the offspring; Three → A, B, and C
  • Expected phenotypic ratio → 1:2:1
  • Total number of individuals, N = 100
  • A = 18 individuals
  • B = 55 individuals
  • C = 27 individuals

So, let us first state the hypothesis:

  • H₀= the population is equilibrium for this locus → F(A) = 25%,  F(B) = 50%, F(C) = 25%  
  • H₁ = the population is not in equilibrium

Now, let us calculate the number of expected individuals, according to their expected ratio.

4 -------------- 100% -------------100 individuals

1 ---------------  25% -------------X = 25 individuals A

2 --------------  50% -------------X = 50 individuals B

1----------------- 25%--------------X = 25 individuals C

<u>                                                   A                             B                           C</u>

  • Observed                         18                            55                         27
  • Expected                         25                           50                         25
  • (Obs-Exp)²/Exp                1.96                        0.5                        0.16

<u>(Obs-Exp)²/Exp</u>

A)  (18 - 25)²/25 = 49/25 = 1.96

B)  (55 - 50)² / 50 = 25/50 = 0.5

C)  (27 - 25)²/25 = 4/25 = 0.16

Chi square = X² = Σ(Obs-Exp)²/Exp  

  • ∑ is the sum of the terms
  • O are the Observed individuals: 2 in chamber B, and 18 in chamber A.  
  • E are the Expected individuals: 10 in each chamber  

X² = ∑ ((O-E)²/E) = 1.96 + 0.5 + 0.16 = 2.62

Freedom degrees = 2

Significance level, 5% = 0.05  

Table value/Critical value = 5.99

X² < Critical value

2.62 < 5.99    

<em>These results suggest that there is </em><u><em>not enough evidence to reject</em></u><em> the null hypothesis. We can assume that </em><u><em>the locus under study in this population is in equilibrium H-W.  </em></u>

 

6 0
3 years ago
Organization is one of the characteristics of life. Explain how your observations under the magnifying glass support this idea.
seraphim [82]

Answer:

All living things are made up of cells. Cells are building blocks of life. Cells are the simplest level of organization. The structure of multicellular organisms are made up of many parts that are required for survival of organisms. The level of organization in multicellular organisms includes: cells, tissues, organs and organ system. The organization is necessary for the body of the organisms to function properly as a characteristic feature of living being.

Magnifying glass is a convex lens that is fitted in a microscope can be used to magnify the image of object under observation. A magnifying glass in a microscope can be used to magnify minute cells and small living creatures. All cells aggregate to form tissues. It can be used to see the arrangement of cells in a tissue specimen and small organelles like chloroplast, mitochondria, nucleus and others.

Therefore, observations under the magnifying glass support  the idea of organization is one of the characteristics of life.  

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3 years ago
I need help with biology please
IgorC [24]

Answer:

All but B are true

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