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bezimeni [28]
3 years ago
13

63 cm and 6 m wich one is great than other

Biology
2 answers:
enot [183]3 years ago
7 0
Well 1m = 100cm
so 6m = 600cm. 600cm > 63cm. Hence, 6m is greater.
nevsk [136]3 years ago
5 0
6 m because 12 cm equals 1 foot a meter is bigger than a foot
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Two differences between hormones and the nervous system
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Hormones can be proteins, lipids or cholesterol-based molecules. Neurotransmitters are protein. The main difference between hormones and neurotransmitters is that Hormones are produced in the endocrine glands and released into the bloodstream where they find their movement targets at a distance from their origin. In contrast, Neurotransmitters are released into the synaptic space by a terminal of an excited presynaptic nerve cell and transmit a nerve signal to the neighboring postsynaptic nerve cell.

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In Drosophila, the genes for withered wings (whd), smooth abdomen (sm) and speck body (sp) are located on chromosome 2 and are s
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Answer:

A) 47; B) 33; C) 272; D) 122

Explanation:

The three genes are linked.

The female with withered wings and a smooth abdomen has the genotype whd sm sp+/whd sm sp+.

The male with a speck body has the genotype whd+ sm+ sp/whd+ sm+ sp.

Both individuals are homozygous for all genes, so each of them only produces one type of gamete. The resulting F1 therefore has the genotype whd sm sp+/ whd+ sm+ sp, heterozygous for all genes and with a wild-type phenotype.

The females of the F1 were mated with homozygous recessive males (test cross): whd sm sp/whd sm sp.

<h3>A)</h3>

If we assume interference is 0, the probability of crossing over happening between the genes whd and sm is independent from the probability of crossing over happening between sm and sp.

The distance = frequency of recombination × 100, so the frequency of recombination (RF) between genes whd and sm is 0.305 and the RF between genes sm and sp is 0.155.

<u>The expected double crossover progeny among the 1000 offspring will be:</u>

RF whd-sm × RF sm-sp  × 1000 =

0.305  × 0.155 × 1000 = 47 individuals will be double crossover.

<h3>B)</h3>

Interference is 0.3

The interference is calculated as 1- coefficient of coincidence (cc).

cc = observed double crossover/expected double crossover

Therefore:

I = 1 - cc

cc = 1 - I

<u>cc = 0.7</u>

Observed DCO / 47 = 0.7

Observed DCO = 0.7  × 47

Observed DCO ≅ 33

<h3>C)</h3>

The parental gametes are whd sm sp+ and whd+ sm+ sp (the genotype of the F1 female is known).

Looking at them and at the gene map we can tell that the gametes that give rise to withered wings, speck body (whd sm+ sp) and smooth abdomen (whd+ sm sp+) phenotypes are the result of recombination occurring between genes whd and sm.

To calculate the expected number of individuals with those phenotypes among the 1000 progeny we need to determine the frequency of recombination between the genes whd and sm considering there's interference.

The distance whd-sm = RF x 100

The recombination frequency is the sum of the single crossover between whd and sm and the double crossovers.

The frequency of DCO is 33/1000=0.033.

Distance whd-sm/ 100 = SCOwhd-sm + DCO

0.305 - 0.033 = SCO whd-sm

<u>Frequency of SCO whd-sm= 0.272</u>

And the expected number of individuals with those phenotypes will be 0.272 x 1000 = 272.

<h3>D)</h3>

The gametes that originate the phenotypes withered wings, speck body, smooth abdomen (whd sm sp) and wild type (whd+ sm+ sp+) are the result of recombination between genes sm and sp.

Distance sm-sp/ 100 = SCOsm-sp + DCO

0.155 - 0.033 = SCOsm-sp

<u>Frequency of SCO sm-sp= 0.122</u>

And the expected number of individuals with those phenotypes will be 0.122 x 1000 = 122.

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3 years ago
It is important to conduct multiple trials because _____.
Angelina_Jolie [31]

B. it makes your results more convincing

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It is important to conduct multiple trials in an experiment because it makes results more convincing.

Multiple trials removes and spreads error from one or more steps in experiment.

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  • Precision is very important in experiments.
  • When a scientist carries out multiple trails in an experiment, it helps to remove any likely error that might have been carried into the experiment.
  • Multiple trials are key to efficiency of experiments.
  • From the results we can confidently state findings based on statistically backed data obtained.

learn more:

Experiment brainly.com/question/5096428

#learnwithBrainly

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meriva

Answer:

B. Stress caused by forces that stretch an area of the crust made the rock to break

Explanation:

From the picture inserted to this problem, we see a unit that has been severely fractured.

Fracturing results from the brittle deformation of a rock under applied stress.

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  • We can obviously see different sets of joint sets on the body of the rock in the picture attacked.
  • Also, a prominent fault which resembles an extensional fault can also be seen.
  • Therefore, the stress caused the stretch of the area which in turn makes the rock the rock to break.
6 0
3 years ago
Read 2 more answers
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