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lyudmila [28]
2 years ago
15

Forests maintain a balance between the amount of ______ and ______ gases in the atmosphere​

Biology
2 answers:
kondor19780726 [428]2 years ago
3 0

Answer:

forests maintain a balance between the amount of carbon-dioxide and oxygen gases in the atmosphere...

Hope this helps!!❤

Varvara68 [4.7K]2 years ago
3 0

Answer:

.......the amount of CARBON DIOXIDE and OXYGEN gases.....

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Explain Mendel's law of independent assortment and how the 9:3:3:1 phenotypic ratio among the F2 of a dihybrid cross provides ev
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Answer:

Explanation:

Mendel's law of independent assortment state that two different genes assort independently in gamete formation.

To reach this conclusion, one has to do a dihybrid cross. This means that two genes responsible for different traits need to be analyzed at the same time.

1) Starting with a <u>parental generation of a cross between two pure lines</u> (homozygous for both genes) <u>with different traits</u>, a plant with yellow and round seeds (YYRR) and another with green and wrinkled seeds (yyrr). <u>The F1 will be phenotypically homogeneous (</u>yellow and round)<u>, and genotypically heterozygous (</u><u>YyRr</u><u>)</u>.

2) If the individuals from the F1 are crossed with one another,  we have to do a Punnett Square to determine the phenotypic ratio of the F2.

  • If the genes assort independently, the F1 individuals will produce their different gametes with the same probability. Each possible gamete will appear in a 1/4 proportion: YR, Yr, yR, yr.
  • The 9:3:3:1 ratio is a result of analyzing the possible phenotypes that result from the dihybrid cross.

See the attached image for an illustration of the crosses in each generation and the Punnett Square.

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However B which contains segmental contractions is a peristaltic movement( found also in the oesophagus)isn’t peculiar to the small intestine. The large intestine also experiences this.

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