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nikitadnepr [17]
3 years ago
14

Pieces of DNA left at a crime scene can be multiplied by using

Biology
1 answer:
Sloan [31]3 years ago
6 0


The answer is A .

PCR stands for Polymerase Chain Reaction. It is a method to analyze a short sequence of DNA or RNA and is used to reproduce (amplify) selected sections of the nucleic acid.  Untold numbers of copies can be made of the DNA in just a few hours.

 PCR amplifies the regions of DNA that it targets and can therefore be used to analyze extremely small amounts of sample. This is often critical for forensic analysis, when only a trace amount of DNA is available as evidence.



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How are vascular and non-vascular plants different, and how do each of them work through osmosis?
Lilit [14]

Answer:

Explanation:

Vascular plants have tubelike structures that carry water, nutrients, and other substances throughout the plant. Nonvascular plants do not have these tubelike structures and use other ways to move water and substances.

Vascular plants are said to have a true stem, leaves, and roots due to the presence of vascular tissues. Non-vascular plants do not have true roots, stems, or leaves and the tissues present are the least specialized forms of tissue. Some examples of vascular plants include maize, mustard, rose, cycad, ferns, clubmosses, grasses. Some examples of non-vascular plants include moss, algae, liverwort, and hornwort.

How vascular plants work through osmosis

The xylem of vascular plants consists of dead cells placed end to end that form tunnels through which water and minerals move upward from the roots to the rest of the plant. Through the xylem vessels, water enters and leaves cells through osmosis.

How non vascular plants work through osmosis

Because non vascular plants do not have the xylem and phloem ystem, they absorb water right into their cells through their leaves when it rains or when dew falls. Internal cells get their water by passive osmosis. While, they use rhizoids to transport nutrients and minerals.

8 0
2 years ago
In drosophila, proper anteroposterior and dorsoventral development requires a separate set of maternal effect gene products accu
rosijanka [135]

It is true. In drosophila, distinct sets of maternal impact gene products must accumulate in the proper region of the embryo to ensure proper anteroposterior and dorsoventral development.

<h3>What makes Drosophila unique?</h3>

The use of Drosophila over vertebrate models has many technological advantages;

  • they are simple and affordable to culture in lab settings,
  • have a significantly shorter life cycle,
  • produce huge numbers of externally deposited embryos
  • may be genetically manipulated in a variety of ways.
<h3>Why is Drosophila referred to be the genetic Cinderella?</h3>
  • Drosophila, which means "dew loving," is derived from the Greek word drósos.
  • Fruit flies, or Drosophila melanogaster, are referred to as the genetic Cinderella.
  • This term was given to them because of their 12-day lifetime, ease of culture, and ability to produce numerous offspring from a single reproduction.

learn more about drosophila here

brainly.com/question/14458439

#SPJ4

4 0
1 year ago
If researchers lesion (cut or destroy) the amygdala of a cat, what would be the likely result?
Roman55 [17]

it will show no fear.

Hope this helps!

-Payshence



6 0
3 years ago
Which of the following is an example of a phenotype (select all that apply)?
lions [1.4K]

Answer:

brown hair and physical trait

7 0
2 years ago
4 Suggest how being an annual plant helps a weed to live in its habitat.
kobusy [5.1K]

Answer:

Answer is on the pic

Explanation:

I hope it's helpful!

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