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3 years ago

What effect would it have on the circulatory system if a person quit smoking?

1 answer:

6 0

It really wouldn't make a big change to the circulatory system because the damage has already occurred but it surely would prevent it from getting the circulatory system any worse.

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Name two unusual places that bacteria can live <br><br><br> ASAP

Sunny_sXe [5.5K]

Answer:

Earth's Upper Atmosphere. And Volcanoes.

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3 years ago

Select the correct answer from each drop-down menu. Study the pie chart, and then complete the passage. Causes of deforestation

inessss [21]

2005 and gasses and methane

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3 years ago

Judging from the map, which region probably has cooler summers than it would without the effect of a nearby ocean current?

fredd [130]

Maybe a place that is by the equator

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4 years ago

Read 2 more answers

Imagine that you attempted to recreate Mendel's work with garden peas. You began by crossing true breeding violet-flowered, tall

salantis [7]

Answer:

(a) 90

(b) 30

(d) 10

F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation.

F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment

Explanation:

The F2 phenotypes are supposed to be in 9:3:3:1 according to Mendelian law. The total number of F2 progeny is: 80 + 36 + 39 + 5 = 160

(a) Hence, the expected number of tall, violet plants will be:

9/16 x 160 = 90

(b) Expected number of tall, white plants will be:

3/16 x 160 = 30

(d) Expected number of dwarf, white plants will be:

1/16 x 160 = 10.

Total number of tall F2 plants = 80 + 36 = 116

Total number of dwarf F2 plants = 39 + 5 = 44

Expected ratio of tall:dwarf plants according to Mendel = 3:1

Expected number of tall plants = 3/4 x 160 = 120

Expected number of dwarf plants = 1/4 x 160 = 40

Chi square $X^2$

= $\frac{(observed frequency - expected frequency)^2}{expected frequency}$

$X^2$ for tall = $\frac{(116 - 120)^2}{120}$

= 0.1333

$X^2$ for dwarf = $\frac{(44 - 40)^2}{40}$

= 0.40

Total $X^2$ = 0.1333 + 0.4

0.5333

Degree of freedom = n - 1

2 - 1 = 1

Tabulated $X^2$ (α = 0.05) = 3.841

Since the tabulated $X^2$ is more than the calculated $X^2$ , the hypothesis that the F2 data for stem length (tall:dwarf) is consistent with Mendel's law of segregation is accepted.

Observed Expected $X^2$

tall, violet flowers 80 90 $\frac{(80-90)^2}{90} = 1.11$

tall, white flowers 36 30 $\frac{(36-30)^2}{30} = 1.2$

dwarf, violet flowers 39 30 $\frac{(39-30)^2}{30} = 2.7$

dwarf, white flowers 5 10 $\frac{(5-10)^2}{10} = 2.5$

Total 160 160 7.51

Degree of freedom = 4 - 1 = 3

Tabulated $X^2$ (α = 0.05) = 7.815

The tabulated $X^2$ value is more than the calculated $X^2$ value. Hence, F2 data for stem length (tall:dwarf) and flower color (violet:white) is consistent with Mendel's law of independent assortment.

3 0

3 years ago

What is the substance that makes up the cell wall

zlopas [31]

<h3>Answer:</h3>

<h2>What is the substance that makes up the cell wall?</h2>

<h3>Answer:Cellulose Microfibrils</h3>

<h3>The cell wall is composed of a network of Cellulose Microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin.</h3>

<h2>Please don't delete my answer :(</h2>

Explanation:

<h2>#Princesses Rule</h2>

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2 years ago