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Alex73 [517]
3 years ago
8

What is a possible reason for extinction?

Biology
1 answer:
Taya2010 [7]3 years ago
7 0

Answer:

The number of habitats falls below a critical level.

Explanation:

The possible reason for extinction is that the number of habitats falls below a critical level. This makes it impossible for organisms to survive.

  • A habitat is the dwelling place of living organism in an ecosystem.
  • The resources and other materials that ensures the survival of an organism are made available in the habitat.
  • When a habitat begins to thin out and can no longer support organisms, then extinction will ensue.  
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DNA replication occurs prior to meiosis and _________.
Evgesh-ka [11]
A. Mitosis is the correct answer.

DNA replication occurs in the two major types of cell division: mitosis and meiosis.

Mitosis is the splitting of a normal cell into two daughter cells and involves complete replication of the cells DNA to produce two identical copies. Meiosis is a specialised and more complex two-stage form of cellular division related to sex cells and involves DNA replication followed by an exchange of DNA material within/between the chromosomes to mix genes from both parents and produce daughter cells with half the number of chromosomes as the original parent cell. Animal sperms and eggs are examples of cells produced by meiosis and contain half the number of chromosomes as normal cells. When combined during fertilization the egg and sperm produce a cell with the full compliment of chromosomes.

Cytokinesis is a part of the cellular life cycle that is related specifically to the division of the cytoplasm (basically the "soup" of material inside the cell). It is part of the cellular division process but not specifically related to nuclear division (i.e. DNA replication).

Transcription relates to the production of RNA from DNA which is then used for protein synthesis. DNA is not replicated during the transcription process, rather, this is a separate process critical for the production of proteins by the cell.
6 0
3 years ago
Why can bacteria populations evolve faster than human populations
raketka [301]
Bacteria is not as complex as human and other animal lives, which means they need less energy and DNA to evolve in these ways.
7 0
3 years ago
Explain why a silent mutation might not affect the protein for which it codes
jasenka [17]
Codons that code for the same amino acid are termed synonyms, Silent mutations are base substitutions that result in no change of the amino acid or amino acid functionality when the altered messenger RNA (mRNA) is translated.
7 0
3 years ago
The half — life of nickel is 96 years. How much of a 30-gram sample is left after 270 years?
-Dominant- [34]

The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

<h3>How to determine the number of half-lives </h3>

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

  • Half-life (t½) = 96 years
  • Time (t) = 270 years
  • Number of half-lives (n) =?

n = t / t½

n = 270 / 99

n = 2.8125

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 30 grams
  • Number of half-lives (n) = 2.8125
  • Amount remaining (N) =?

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

Learn more about half life:

brainly.com/question/26374513

#SPJ1

5 0
1 year ago
Where is testosterone produced?<br>1-the thyroid gland<br>2-the testes<br>3- the ovaries<br><br>​
Ne4ueva [31]
I think the testes.
6 0
3 years ago
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