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Aneli [31]
3 years ago
12

Which of the following statements about change in ecosystems is true?

Biology
1 answer:
Alex787 [66]3 years ago
7 0

Answer:D

Explanation:

Human activity and natural events both effect the ecosystem causing change.

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Which component of dna are held together by weak hydrogen bonds?
Troyanec [42]

Answer:

the paired bases( nitrogenous bases )

7 0
2 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

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brainly.com/question/26374513

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5 0
1 year ago
Use the numbers 1, 2, 3, 4, and 5 to place the protein creation steps below in the correct order. Ribosome attaches to the mRNA.
kirza4 [7]

Answer: The correct sequence for the protein creation is as follows-

1) Information is transcribed in DNA to mRNA.

2) mRNA leaves the nucleus.

3) Ribosome attaches to the mRNA.

4)  tRNA anticodon carries an amino acid that compliments the mRNA codon.

5) The chain of amino acids forms a protein.

According to the Central Dogma, the genetic information is transferred from DNA to mRNA to Proteins.

The first step is transcription in which DNA is converted to mRNA with the help of enzyme RNA polymerase. In eukaryotic cells, this process occurs in the nucleus.

This is followed by translation, which takes place in the cytoplasm when mRNA leaves the nucleus.

Ribosomes are the specialized organelles, which act as the site for protein synthesis ( translation).

Ribosomes attach to the mRNA. tRNA brings amino acid, which has anticodon complementary to the codon present in the mRNA. A chain of amino acids is thus synthesized, which is called Protein.

8 0
3 years ago
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How does urbanisation affect water?
Papessa [141]

Answer:urbanization is responsible for the loss of vegetation and soils.

Explanation:

As urbanization alters the natural amount of water that takes each route.

3 0
3 years ago
An element may have more than one isotope if the atoms have different numbers of
lesantik [10]
B. Neutrons —///—:/—
7 0
3 years ago
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