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sineoko [7]
3 years ago
12

What is a fossil and how can they be used to help unveil earth’s history

Biology
1 answer:
Firdavs [7]3 years ago
5 0

Answer:

fossils are ancient bones or plants fossilized into rocks such as dinosaur bones(fossils) and they help unveil earths history by telling us more about them and what they might have looked like and big or small they were everything we know we know because of fossils

Explanation:

If brainiest is earned its greatly Appreciated

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Assuming no crossing over between the gene in question and the centromere, during what phase of meiosis do alleles segregate?
choli [55]

Answer:

During Anaphase stage

Explanation:

Meiosis is the type of cell division employed during gamete formation when each resulting gamete (daughter cell) has their chromosomal number reduced by half. Meiosis occurs in a two step division; Meiosis I and II. Meiosis I involves the separation of homologous chromosomes (similar but non-identical chromosomes received from each parent) while Meiosis II involves separation of sister chromatids (replicated chromosomes).

Alleles are present on the chromosomes which segregate or separate during the anaphase stage. Alleles received from each parent are separated in Anaphase I of meiosis I, which the identical replicated alleles are separated in anaphase of meiosis II.

7 0
3 years ago
Why is it important for plants to “hold enzymes in their functional shapes”
Svetllana [295]
<span> because if the shape of the enzyme changes it may not function or it may function differently.
hope this helps</span>
7 0
3 years ago
Read 2 more answers
What Are the process of photosynthesis and cellular respiration produces?
VikaD [51]

photosynthesis produces oxygen and glucose as the end products whereby the glucose is used as food by plants and oxygen as a byproduct.

cellular respiration produces water and carbon dioxide and the end products and by products where by energy is stored

7 0
2 years ago
In which of the following cells would the cycle be shortest for adult cell, teenager kidney,embryonic cell, unfertilised egg cel
Lapatulllka [165]
Unfertilised egg cell
6 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
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