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2 years ago

What are two conclusions that Mendal made about his research on genetics

1 answer:

6 0

The two conclusions that Mendal made about his research on genetics depended on the law of segregation and law of independent assortment.

Explanation:

The “law of segregation” says that, pairing of genes (alleles) take place in each parent. During split up, one gene is only passed from each parent to the offspring. But which particular gene is passed is is not know and is completely up to chance.

The “law of independent assortment” states, from all pairs of gene each offspring receives different pair of gene independently. Thus, when a gene is inheritant at one location in a genome it is not necessary that it should influence the inheritance of a gene in another location.

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Can sunscreen damage other organisms?

miv72 [106K]

Sunscreen can have negative effects on corals and other marine organisms under certain circumstances.

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2 years ago

How many half-lives are required for the concentration of reactant to decrease to 1.56% of its original value?4247.56.56

neonofarm [45]

Answer:

6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given:

Concentration is decreased to 1.56 % which means that 0.0156 of $[A_0]$ is decomposed. So,

$\frac {[A_t]}{[A_0]}$ = 0.0156

Thus,

$\frac {[A_t]}{[A_0]}=e^{-k\times t}$

$0.0156=e^{-k\times t}$

kt = 4.1604

The expression for the half life is:-

Half life = 15.0 hours

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$\frac{4.1604}{t}=\frac {ln\ 2}{t_{1/2}}$

$t = 6\times t_{1/2}$

<u>6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.</u>

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3 years ago

Mountains form when plates _______.

Dimas [21]

Answer:

They form when plates collide. I hope this helps you!

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2 years ago

What happens to the temperatures when we have direct sunlight vs indirect sunlight?

lawyer [7]

Explanation:

When we have direct sunlight, the temperature is higher compared to indirect sunlight.

Direct sunlight is usually overhead whereas indirect sunlight is at an angle to the surface.

Direct sunlight impacts the surface with more energy concentrated on a smaller surface area.
This warms the surface more.
Indirect sunlight is diffuse and spreads over a wider area.
This leads to a reduction in temperature.

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3 years ago

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of

BlackZzzverrR [31]

The alignments of the planets would be the correct answer.<span />

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3 years ago