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morpeh [17]
3 years ago
11

The physician is attending to a 72-year-old client with a malignant brain tumor. the physician recommends immediate radiation th

erapy. what is a reason for the physician's recommendation?
Biology
1 answer:
MariettaO [177]3 years ago
3 0
Physician recommends radiation therapy because radiation therapy helps in preventing cellular growth. It uses high-energy radiation to shrink tumor or kill cancer cells. It may be used to cure or to control malignancy when the tumor can no longer be removed or when lymph node involvement is present; also, it can be used prophylactically to prevent spread. Radiation therapy kills cancer cells by damaging their DNA which is the molecules inside cells that carry genetic information and pass it from generation to generation. Radiation therapy can either damage DNA directly or create charged particles within the cells that can in turn damage the DNA. Cancer cells whose DNA is damaged beyond repair stop dividing or die and when these cells die, they are eliminated by the body through natural process.
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Why are DNA fingerprints are more reliable than hand fingerprints in solving crimes.
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Dna gives an automatic trace, ur dna is original and no one else has it so it’s easier to track
5 0
3 years ago
Why is energy necessary for living things
Maslowich

Answer:

Cells cannot survive on their own. They need energy to stay alive. They need the energy to perform functions such as growth, maintaining balance, repair, reproduction, movement, and defense.

Explanation:

5 0
3 years ago
You discover a population of mustard plants and find it to be at Hardy–Weinberg equilibrium with respect to the R locus. Suppose
natulia [17]

Answer:

The fraction of heterozygous individuals in the population is 32/100 that equals 0.32 which is the genotipic proportion for these endividuals.

Explanation:

According to Hardy-Weinberg, the allelic frequencies in a locus are represented as p and q, referring to the alleles. The genotypic frequencies after one generation are p² (Homozygous for allele p), 2pq (Heterozygous), q² (Homozygous for the allele q). Populations in H-W equilibrium will get the same allelic frequencies generation after generation. The sum of these allelic frequencies equals 1, this is p + q = 1.

In the exposed example, the r-6 allelic frequency is 0,2. This means that if r-6=0.2, then the other allele frequency (R) is=0.8, and the sum of both the allelic frequencies equals one. This is:

p + q = 1

r-6 + R = 1  

0.2 + 0.8 = 1

Then, the genotypic proportion for the homozygous individuals RR is 0.8 ² = 0.64

The genotypic proportion for the homozygous individuals r-6r-6 is 0.2² = 0.04

And the genotypic proportion for heterozygous individuals Rr-6 is 2xRxr-6 = 2 x 0.8 x 0.2 = 0.32

5 0
4 years ago
Which rapidly developing landform is often found in Florida?
alisha [4.7K]

Answer:

Beaches, Mountains, Coastal Plains, Glacier, lackes

3 0
3 years ago
Read 2 more answers
List 2 similarities between mitosis and meiosis?
AlekseyPX
Meiosis<span> and </span>mitosis<span> are both preceded by one round of DNA replication, but </span>meiosis includes two nuclear divisions. the four daughter cells resulting from meiosis are diploid and identical to the parent cell. 
8 0
3 years ago
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