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timurjin [86]
3 years ago
13

Sustancia que regula la temperatura del cuerpo, ayuda a llevar nutrientes y oxígeno a las células, convierte los alimentos en en

ergía y conforma el 83% de la sangre
Biology
1 answer:
zavuch27 [327]3 years ago
7 0

Answer:

Agua

Explanation:

El agua costituye aproximadamente 3/4 partes de la tierra, 70% del cuerpo humano esta constituido por agua, y aproximadamente el 90% de las células contiene agua. Esta sustancia es la mas importante para el funcionamiento de nuestro organismo y para alcanzar un equilibrio. Todos los seres vivos dependen del agua para sobrevivir, desempeñando un rol único y central en el funcionamiento de los sistemas vivos.

El agua cumple diversas funciones en el organismo, entre ellas, como las mencionadas en el problema, se encuentra:

  • Regula la temperatura del cuerpo. Dependiendo de la temperatura ambiental, las moleculas de agua permiten que el cuerpo mantenga la temperatura si el ambiente esta frio, y emane calor si la tempeartura ambiental es elevada.
  • Convierte los alimentos en energía. Cumple un rol principal en la descomposición bioquímica de alimentos.
  • Ayuda a llevar nutrientes y oxígeno a las células. Una vez extraidos los nutrientes, se convierte en el medio por el cuál estos últimos pueden transportarse hasta alcanzar las celulas de destino final.
  • Conforma el 83% de la sangre. Como se mencionó previamente consituye la mayor parte de la sangre. Solo el plasma sanguineo esta constituido por el 90% de agua.  

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3 years ago
When pink sweet peas were self-pollinated and the seeds were collected and sown, the following flower colors were obtained: Red
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Answer:

c. 1:2:1

The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

Explanation:

If flower color were determined by a gene showing incomplete dominance, the possible genotypes and phenotypes are as follows:

  • RR- red
  • ww - white
  • Rw - pink

If pink sweet peas are self-pollinated, then a cross between two heterozygous individuals is done (Rw x Rw).

<u>From this cross the expected ratios are:</u>

  • 1/4 RR (red)
  • 2/4 Rw (pink)
  • 1/4 ww (white)

So the null hypothesis is that the observed results exhibit a 1:2:1 ratio.

<h3><u>Chi square test</u></h3>

X^{2} = \sum \frac{(Observed - Expected)^2}{Expected}

<u>The observed frequencies were:</u>

  • 34 Red
  • 76 Pink
  • 40 White

Total 150

<u>The expected frequencies for our null hypothesis are:</u>

  • 1/4 x 150 = 37.5 Red
  • 2/4 x 150 = 75 Pink
  • 1/4 x 150 = 37.5 white

X^{2} = \frac{(34- 37.5)^2}{37.5} + \frac{(76- 75)^2}{75} + \frac{(40- 37.5)^2}{37.5}

X^2=0.5067

The degrees of freedom (DF) are calculated as number of phenotypes - 1; in this case DF = 3-1 = 2.

If we look at the Chi square table, for 2 DF and a probability of p0.05, the critical value is 5.991

Our X^2 value of 0.5067 is less than the critical value, so we do not reject the null hypothesis. The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

8 0
3 years ago
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