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blsea [12.9K]
3 years ago
13

Please help me! does anyone know this?

Biology
1 answer:
Arada [10]3 years ago
7 0

Answer:

Begins with/Ends with: One diploid cell, four haploid cells

Occurs in: Humans, animals, plants

Results in: Sexual Reproduction, Seeds

Type of Reproduction: #1 (too long to type :)

Function: Biological reproduction, generation of the species

Hope this helps!

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It is common knowledge that elephants are deathly afraid of mice. What is not so common knowledge is the reason why. Clearly it
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Explanation:

mice can bite the elephant's trunk and/or feet and they can get the elephants a surprise.

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3 years ago
A scientist is studying a cell and can clearly see that it has ribosomes and mitochondria. Which statement best describes how th
ruslelena [56]

Answer:

The cell is eukaryotic because it contains mitochondria.

nucleus

Explanation:

8 0
3 years ago
8. Unlike DNA, RNA
Aliun [14]

Answer:

D

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DNA pairs with adenosine, thymine, cytosine, and guanine

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5 0
3 years ago
If 1/8 remains after 21 years, what is the half-life?
vagabundo [1.1K]

Half life formula

The number of unstable nuclei remaining after time t can be determined according to this equation:

N(t) = N(0) * 0.5^(t/T)

where:

N(t) is the remaining quantity of a substance after time t has elapsed.

N(0) is the initial quantity of this substance.

T is the half-life.

It is also possible to determine the remaining quantity of a substance using a few other parameters:

N(t) = N(0) * e^(-t/τ)

N(t) = N(0) * e^(-λt)

τ is the mean lifetime - the average amount of time a nucleus remains intact.

λ is the decay constant (rate of decay).

All three of the parameters characterizing a substance's radioactivity are related in the following way:

T = ln(2)/λ = ln(2)*τ

How to calculate the half life

Determine the initial amount of a substance. For example, N(0) = 2.5 kg.

Determine the final amount of a substance - for instance, N(t) = 2.1 kg.

Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.

Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.

If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.

8 0
3 years ago
I need some help with some Qs
wel
You have to put up your question so we can help you.
4 0
3 years ago
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