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vichka [17]
3 years ago
14

3. The diversity of organisms present on Earth is the result of--

Biology
1 answer:
alexgriva [62]3 years ago
8 0
A. Ecosystem stability
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Which weighs more: a pound of feathers or a pound of lead? Explain.
ki77a [65]

Answer: both weigh the same.

This is a very obvious question just because the lead is heavier that does not mean it ways more than the other. One pound of feathers is the same as one pound of lead

6 0
3 years ago
The part of the brainstem that controls heartbeat and breathing is called the
Sliva [168]
Hello!

The brainstem that controls those functions, as well as others is known as the <span>medulla. The Medulla is the lower half of the brain. This stem is connected to the spinal cord, so if damaged will more than likely result in death/brain death,

I hope this helped!

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8 0
3 years ago
In STR profiling, PCR is used to obtain enough DNA to then detect the number of STRs at I specific loci.​
Licemer1 [7]

PCR technique is important in STR profiling in order to amplify and detect the number of Stars at a specific gene loci.

<h3>What is Short Tandem Repeat (STR) profiling?</h3>

Short Tandem Repeat profiling is a technique in molecular biology used to compare allele repeats known as STRs at specific loci in DNA between two or more samples.

The PCR (polymerase chain reaction) technique used in STR profiling involves making multiple copies is a particular segment of DNA in order to make enough quantities detectable in the analysis.

Therefore, PCR technique is important in STR profiling to detect the number of Stars at a specific gene loci.

Learn more about PCR at: brainly.com/question/13252565

4 0
2 years ago
Which of the following is a definition of reduction? a. Reduction is the gain of BOTH electrons AND oxygen. b. Reduction is the
Arada [10]

Answer: Option C) Reduction is the gain of electrons.

Explanation:

Reduction is a process involving a gain of electron(s), while oxidation involves a loss of electron(s).

Thus, an oxidizing agent is a substance that accepts electron(s) and become reduced, while a reducing agent is a substance that donates electron(s) and so becomes oxidized.

Thus, reduction is the gain of electron(s)

5 0
3 years ago
What are the phases of mitosis and meiosis and what do they do?
ehidna [41]
Prophase
Metaphase
Anaphase
Telophase

Meiosis is the process of cell division by which involving gametes. Cell division is just the same for sperm and egg cells, but they have distinguishable descriptions and labels in the process. Spermatogenesis is for the males’ sperm cells and oogenesis is the process for females’ egg cells. The cell division of meiosis involves the two phases, respectively meiosis I and meiosis II. Meiosis I like mitosis is the cell division that produces diploid cells<span>. These diploid cells are cells that contain a complete pair of chromosomes which is 46. The result is two diploid cells after the first meiosis. To provide clear explanation, in contrast haploid cells only contain 23 chromosomes and are created after meiosis II which is 4 in number. </span>
6 0
3 years ago
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