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irga5000 [103]
3 years ago
10

Which statement BEST supports the author's analysis that unshelled fish are more challenging game? A) And, fish or no fish, ther

e are compensations. B) An unshelled fish is lively and elusive past the power of words to portray, and in this, undoubtedly, lies its desirability. C) Tired eyes look past the musty ledger and the letter files to a tiny sapphire lake, set in hills, with the late afternoon light streaming in glory from the far mountains beyond. D) Other fish who have just been weaned and are beginning to notice solid food will repeatedly take a hook too large to swallow, and be dragged into the boat, literally, by the skin of the teeth.
Biology
2 answers:
In-s [12.5K]3 years ago
6 0
B; An unshelled fish is lively and elusive past the power of words to portray, and in this, undoubtedly, lies its desirability.
Vanyuwa [196]3 years ago
6 0

the answer is B.) An unshelled fish is lively and elusive past the power of words to portray, and in this, undoubtedly, lies its desirability.

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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
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>

 

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3 years ago
Rectangle JKML is rotated clockwise around point P. What is the angle of rotation? 45° 90° 180° 360°
laiz [17]

your answer is 45  digrease

its right on edgenuity

3 1
3 years ago
How does substance A affect the amount of activstion energy needed by the process? Explain?
asambeis [7]

<u>Answer</u>:

Substance A affects the amount of the activation energy needed by the process by catalyzing the reaction. Enzymes are the natural biological catalyst that lowers the activation energy for a reaction to proceed faster at a low energy requirement.

<u>Explanation</u>:

The reactants in the solution react to form a product. For a reaction to happen some energy is needed. The energy which helps reactants to break some bonds and make other bonds to make a product is known as activation energy.

Enzymes are the biological molecules which lower this activation energy by catalyzing the reaction by helping in breaking old bonds and forming new bonds to create a product.

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A city has found that water from shallow_deph Wells show signs of contamination from heavy metels. What is *most* likely to happ
romanna [79]
I feel like the answer could be either B or C
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3 years ago
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describe two observations of water that provide evidence that water molecules are attracted to one another
const2013 [10]

Answer:

Polarity causes water molecules to become attached to each other.  Cohesion is also know as the attachment of 2 of the same substance

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4 years ago
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