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Sati [7]
3 years ago
14

A certain element has a half-life of 1,000 years. How much of a sample of this element remains after 2,000 years?

Biology
1 answer:
quester [9]3 years ago
5 0

Answer:

A quarter of the sample.

Explanation:

Let the quantity at the beginning be T. If the element has a half-life of 1,000 years, it means that after 1000 years, T/2 (which represents half the initial quantity available) would have decayed, remaining T/2.

After another 1000 years (making 2000 years), T/4 (which represents have of the quantity left after the first 1000 years) would have decayed, remaining T/4.

This means that only a quarter of T would be left after 2000 years.

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olchik [2.2K]

Answer:

Connect the centromere to microtubules. (Option A)

Explanation:

The kinetochore is known as the complex of protein which is disc shape in structure. The structure of kinetochore is divided into three parts: inner region, outer region, and fibrous corona. Each part of the kinetochore works in its own way in the separation of the sister chromatids.

During the process of cell division (mitosis, and meiosis) kinetochore collects on the centromere and allows the chromosome to link with microtubules.

8 0
3 years ago
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Which of the following is NOT a density-dependent factor affecting population growth?
sveta [45]

B

<u>Temperature</u> is NOT a density-dependent factor affecting population growth

Explanation:

Density-dependent factors mean variables that are affected by the density of the population. The opposite of density-depend is density-independent factors. These are those variables that affect the density of the population but are not affected by the density of the population.

In this case, temperatures are not affected by the density of the population. However, temperatures affect the density of the population. Most individuals can only survive within an optimal temperature range.

The rest of the choices are density-dependent variables

Learn More:

For more on dependent and independent variables check out;

brainly.com/question/3205171

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7 0
3 years ago
Where can you find carbon​
Aleksandr-060686 [28]

Answer:

We can find carbon in diamond

5 0
3 years ago
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What kind of fossils can tell scientists what dinosaurs ate?
statuscvo [17]

Answer:

Coprolites are the type of fossils which can tell the scientist what dinosaurs ate.

Explanation:

A Coprolites is fossilized faeces.They are classified as trace fossils as opposed to body fossils as they give evidence for the animal's behaviour rather than morphology.This name is derived from Greek words.They were first described by William Buckland in 1829.

3 0
3 years ago
Why use needle loop to prepare fungi slide??
Lilit [14]

Answer:

The needle loop is use to transfer fungi to a soft agar and this will cause or create more fungal growth to occur in the slide.

Explanation:

Needle loop is a tool or device use in microbiology to inoculate microorganisms like bacteria and fungi in media to boost their growth. It is use for sampling and transferring specimens or microorganisms into a media for further analysis, examination and serial dilution.

8 0
3 years ago
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