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nalin [4]
3 years ago
12

What is the half-life of the radioactive isotopes?a. A radioactive isotope decreased to one-half its original amount in 18 month

s.
Biology
1 answer:
arlik [135]3 years ago
3 0

One fourth means (one half) of (one half) .

So the 18 months must be two half-lifes.

The half-life of this particular isotope is 9 months.
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Answer:

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A child is prescribed hematopoietic stem cell transplantation for severe combined immunodeficiency disease. what is administered
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3 years ago
How can human selectivity alter the traits of organisms?
Katena32 [7]

Answer:

The concept predates the term; Plato suggested applying the principles of selective breeding to humans around 400 BC. Early advocates of eugenics in the 19th century regarded it as a way of improving groups of people. In modern usage, the term eugenics has close ties to scientific racism and white supremacism.

Explanation:

5 0
3 years ago
In beetles, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination. The lined
Pie

Explanation:

The genes that determine color and pattern are linked.

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<h3><u>Initial cross</u></h3>

Homozygous lined aqua beetle has the genotype <em>lb/lb</em>

It can produce only 1 type of gamete: <em>lb</em>

X

Homozygous solid blue beetle has the genotype<em> </em><em>LB/LB</em>

It can produce only 1 type of gamete:<em> </em><em>LB</em>

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<h3><u>F1 test cross</u></h3>

Test crosses involve a homozygous recessive individual.

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  • <em>lb</em>

<u>The F1 individual </u><em><u>lb/LB</u></em><u>  can produce 4 types of gametes:</u>

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8 0
4 years ago
What are some things all liquids have in common
Vsevolod [243]
Correct answer. No definite shape.
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