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ch4aika [34]
3 years ago
7

Plants are green because they contain the protein chlorophyll. A bucket was left on the lawn for one week. When the bucket was r

emoved, the grass under the bucket had
turned from green to a yellowish white color. This change is due to the interaction between the grass and
decomposer organisms in the soil, an abiotic factor
2
the amount of sunlight, an abiotic factor
increased moisture under the bucket, a biotic factor
the metal composition of the bucket, a biotic factor
Biology
1 answer:
Aleksandr [31]3 years ago
8 0

Answer:

The amount of ⛅ sunlight .

Explanation:

PLEASE MARK AS BRAINLIEST

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<h2>A - Either Side of The Vaginal Opening</h2>

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3 years ago
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30. Which characteristic of apple trees is most likely to evolve over several generations?
Nady [450]

The tree's life cycle, Because are world is just getting worse and worse so over time tree's will probably live less of a life then they do now.

3 0
3 years ago
In the laboratory, a genetics student crossed flies with normal, long wings to flies with mutant, dumpy wings, which she believe
Marianna [84]

Answer:

a. Chi-Square Value = 0.12

b. Degrees of freedom = 1

c. Reject or fail to reject the hypothesis = fail to reject the hypothesis

Explanation:

<u>Available data:</u>

  • Cross: long wings to flies with mutant, dumpy wings
  • F1) 100% long-winged flies
  • F2)  672 long-winged flies 218 dumpy-winged flies
  • Hypothesis: the dumpy wing is inherited as a recessive trait

Let us name the allele for Long L and the allele for dumpy l

The number of observed individuals:

  • Total number: 890 flies (672 + 218)
  • Long-winged = 672
  • Dump-winged = 218

In the F2 generation, if l was a recessive allele and L a dominant allele, exhibiting complete dominance, we would expect a 3:1 phenotypic ratio.

Cross:          Ll   x   Ll

Gametes)   L   l    L  l

Punnett square)   L     l

                     L    LL    Ll

                      l     lL     ll

F2) 3/4 LL + Ll long-winged individuals

      1/4 ll dump-winged individuals

From this ratio and the total number of individuals in the F2 generation, we can get the expected number of individuals:

4 possible genotypes ------- 890 individuals

3 LL + Ll genotype ------------X = 667.5 long-winged individuals

1 ll genotype ---------------------X = 222.5 dump-winged individuals

 

Chi square = ∑ (O-E)²/E

LL + Ll = (O-E)² /E

LL+ Ll = (672 - 667.5) ² / 667.5

LL + Ll = 0.03

ll= (O-E)²/E        

ll= (218 - 222.5)² / 222.5

ll= 0.09  

  • Chi square= ∑ ((O-E)²/E) = 0.03 + 0.09 = 0.12
  • Freedom Degrees = genotypes - alleles = 3 - 2 = 1
  • Significance level = 0.05    
  • Table value/Critical value = 3.84

0.12 < 3.84 meaning that there is enough evidence to reject the null hypothesis.

Fail to reject the hypothesis.  The genotypes in the population might be in equilibrium H-W. L is the dominant allele, and l is the recessive allele. The dumpy wing is inherited as a recessive trait.

6 0
3 years ago
Which contains dozens of carcinogens?
DENIUS [597]

Answer:

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2 years ago
Damage to the nerve cells without myelin sneath is perment because regeneration of nerve cells can only happen when
Norma-Jean [14]

Answer:

Damage to the nerve cells without myelin sneath is permenent because the regeneration of nerve cells can only happen when schwann is present!

Hope this helps please give me brainliest!

God bless :)

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3 years ago
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