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kirza4 [7]
3 years ago
6

Pleaseee helppppp!!!! the most can be just like 4 sentences 20 points !!!!!

Biology
1 answer:
elixir [45]3 years ago
8 0

Answer:

The discoveries made by earlier scientists led to the development of modern atomic theory. The modern atomic theory claims that each element is made up of atom of different kind. It explains that atoms are made up of sub-atomic particles.

Claim: Works from earlier scientists helped in the formulation of the atomic theory.

Evidences:

  • John Dalton brought forward the theory that all matter is made up of atoms which are spherical and can move.
  • J.J thomson discovered the electrons.
  • Robbert Millikaan measures the charge on an electron.
  • James Chadwick discovered the neutron.

Reasoning: All these evidences show that the discoveries of the earlier scientists led to the discovery of modern atomic theory.

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"Which mode of inheritance produces heterozygotes with phenotypes that differ from either homozygote but typically more closely
lyudmila [28]

Which mode of inheritance produces heterozygotes with phenotypes that differ from either homozygote but typically more closely resembles one homozygous phenotype than the other?"

A) complete dominance

B) incomplete dominance

C) codominance

D) epistasis

E) incomplete penetrance

Answer:

B) incomplete dominance

Explanation:

Incomplete dominance occurs when the dominant allele of a gene is not able to mask the expression of the recessive allele completely. This results in the expression of a phenotype in the heterozygous genotypes that differ from both homozygous genotypes. However, the phenotype of the heterozygote is closer to one of the homozygous genotypes.

For example, the petal color in four o'clock plant is controlled by a gene with two alleles R and r. Here, the "R" allele can not produce enough pigment in heterozygous conditions to completely mask the expression of the "r" allele and the phenotype of the "Rr" plant is "pink". On the other hand, the phenotype of "RR" plant is red while that of the "rr" plant is "white".

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3 years ago
How do radiation and chemotherapy affect cancer cells?
elixir [45]

Answer:

They destroy the DNA or RNA

Explanation:

Cancer drugs work by damaging the RNA or DNA. The faster the cancer cells divide, the more likely it is that chemotherapy will kill the cells, causing the tumor to shrink. They also induce apoptosis. Radiation therapy is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. The radiations also induce apoptosis. Cancer cells whose DNA is damaged beyond repair stops dividing and die. The damaged cells die, they are broken down and removed by the body.

7 0
3 years ago
Bean plants significantly change the development of their roots when they make nodules, as well as diverting energy and resource
fomenos

Answer:

The roots organ is genereally placed under the soil and may undero variious modifications. The roots are present in plant that help them to absorb water and nutrient from the soil.

Some plant roots contains the bacteria that helps in the conversion of nitrogen into ammonium ions. The plants changes the roots because the rhizobium present in plant roots helps in the conversion of nitrogen so that it can be used by the plants. The Rhizobium produces ammonium (NH4+) ions.

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Why is systems theory important in a workplace?​
Aneli [31]
To help work place with the system
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2 years ago
The sugar and phosphate portion of the nucleotides are found _____ on the DNA twisted ladder.
soldi70 [24.7K]

The sugar and phosphate portion of the nucleotides are found "<em><u>as segments of the rails</u></em>" on the DNA twisted ladder.

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