1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sonbull [250]
3 years ago
11

Which type of rock does B represent? Group of answer choices

Biology
2 answers:
kobusy [5.1K]3 years ago
6 0
I thing it is volcanic rock
vesna_86 [32]3 years ago
4 0

Answer:

idkkkk srry

Explanation:

idkkk sorry

You might be interested in
Under which of the following conditions would a fossil most likely form?
Zepler [3.9K]
It would be A, because a fossil forms after an animal dies, and hundreds to thousands of years of soil or sediment coversit's body, preserving it. :)
4 0
3 years ago
Read 2 more answers
How did reintroducing wolves (biosphere) affect the effects of erosion (geosphere)?
kompoz [17]
Wolves are causing a trophic cascade of ecological change, including helping to increase beaver populations and bring back aspen, and vegetation.beavers.
3 0
3 years ago
Read 2 more answers
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
An island nature preserve brings in 72 NA warblers and 252 SA warblers. Out of the 72 NA birds, 55 have long plumage. Out of the
nalin [4]

401 of these offspring are expected to have long plumage.

To calculate the number of these offspring that are expected to have long plumage the following cross multiplication calculation must be performed:

  • Total birds = 72 + 252 = 324
  • Long plumage birds = 55 + 75 = 130  
  • 324 = 130
  • 1000 = X
  • 1000 x 130/324 = X
  • 130000/324 = X
  • 401.23 = X

Therefore, 401 of these offspring are expected to have long plumage.

Learn more in

3 0
3 years ago
Choose three of the organ systems in the human body. Describe the structure and function of
kozerog [31]

Answer:

2

Explanation:

213414

4 0
2 years ago
Other questions:
  • Two samples of water, 10 grams, and 50 grams, are in separate cups. Which of the following properties is different for the two?
    9·2 answers
  • 1. Just as a person inherits physical traits, a person inherits personality traits as well.
    12·2 answers
  • Name three physical properties of a liquid
    7·2 answers
  • What part of a cell contains the genetic instructions and information?
    7·1 answer
  • The sun shinning on thr surface of a lake can heat up the air just above the water.What happens if this air gets warmer then the
    14·2 answers
  • Where I can get the answers from ?
    10·2 answers
  • Which lifestyle choices lead to good health? Check all that apply.
    10·2 answers
  • Describe the case that was one of the first recorded times of forensic entomology being used in a criminal case. What role did f
    12·1 answer
  • Can someone explain what polymers, monomers, and isomers are to me? What is the difference between isomers and polymers? Thanks,
    15·1 answer
  • Choose the correct order of events in the Kreb's cycle:
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!