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likoan [24]
3 years ago
12

PLEASE HELP!! QUICK!!!! I WILL GIVE 75 POINTS AND BRAINLIEST

Biology
2 answers:
zvonat [6]3 years ago
5 0
It would have a big affect because The environment around the area in Africa will be mined, drilled, or condemned. The area will be used as a resource reserve. The land around will either be damaged or conserved for further mining or sample taking.
Nataly_w [17]3 years ago
3 0
<span>Affects of geothermal plants on the environment
</span>                                Although geothermal plants have many advantages over other conventional fossil fuels units such as it is a renewable resource, but it has many affects as well on the environment. 

Forexample
                 Geothermal plants discharge approximately 6.5 times as much heat, 5.5 times as much water vapours, and 0.5 times as much sulfur per unit of power produces as would a coal plant.
                 They also release hydrogen sulfide, carbon dioxide, arsenic, and mercury at a concentration that have an adverse but not calamitous effects.
ground subsidence is acknowledged as a potential problem.
                pollutant formation  may be independent of the power production rate.
               Effluent pathways may  change abruptly generating hazards that have not been anticipated.
               Pre-operational  testing and random bore holes contribute negatively to the overall impact.
             Waste water may be discharged at  temperatures high enough so that utilization of the waste heat becomes both practical and imperative. 



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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
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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>

 

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What do you think happened to both the elk and aspen tree populations as a result of removing wolves from the park?.
Step2247 [10]

Answer:

When wolves were removed from the habitat, the elk thrived, causing a population increase. more elk means an increase in the need for food. The leaves of an aspen tree make good food for elk causing over-grazing and soon, the "aspen trees will be eaten out."

Explanation:

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