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Crank
3 years ago
11

A paleontologist has recovered a bit of organic material from the 400-year-old preserved skin of an extinct dodo. She would like

to compare DNA from the sample with DNA from living birds. The most useful method for initially increasing the amount of dodo DNA available for testing is ________.
Biology
1 answer:
Fed [463]3 years ago
7 0

Answer:

Polymerase Chain Reaction (PCR)

Explanation:

Polymerase Chain Reaction is a method commonly used to increase or amplify the amount of DNA available in a sample or segment to use it in studies or analyses that require a fair amount of available DNA.

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Evidence of more sophisticated religious beliefs includes _____.
Fudgin [204]
Evidence of more sophisticated religious beliefs includes placement of human remains and <span>crosses on buildings. The correct options among all the options that are given in the question are the second and third options or options "B" and "C". I hope that this is the answer that has come to your desired help.</span>
5 0
3 years ago
Considering the drifting of continents, how do you explain the abundance of marsupials and the absence of native placental mamma
garri49 [273]

Answer:

this phenomenon is a natural consequence of evolutionary processes and continental drift  

Explanation:

Marsupials are mammals in which newborn offspring are carried in a pouch of the female (mother) body. On the other hand, placentals are mammals that complete embryo development in the mother's body, in the placenta. All the extant marsupials are endemic to Australia and the Americas. It has been shown that marsupials diverged (evolved) in South America, Australia and Antarctica when these landmasses were joined. In Australia, marsupials evolved to fit an ecological niche, which can be attributed to geographic isolation due to continental drift, while placental mammals are relatively recent and more scarce (mainly bats and rodents) within this region.

5 0
3 years ago
A number of marine reptiles and birds have salt glands, which have a remarkable ability to concentrate salt solutions for excret
Lemur [1.5K]

Answer:

A)100mL  B)50mL  C)The second option  D)Hypoosmotic Environment

Explanation:

The average Na concentration in the seas and oceans of the world is around 3,5% which mean that in 100 ml of sea water, there is around 3,5 grams of Na.

The weight of one mol of NaCl is 58,44 grams. For 3,5 grams of NaCl, we get 3,5/58,44 = 0,060 mol of NaCl which is 0,060x1000 = 60 mmol/100ml. According to this and the information given in the question about the secretion of the salt glands', if the average sodium concentration is 600mmol/L, we have 60*10 = 600mmol/L so it would take 100 mililiters of water to excrete.

If the average Na concentration of the salt gland's secretion were 300 mmol/L, only 50 mililiters of water would be needed to excrete the same sodium load.

The second option of secretion is hyperosmotic to seawater because the concentration is higher.

Osmoregulation is the process of balancing the amount of water and salt between the body of the organism and its surrounding environment. For salt glands to be advantageous for osmoregulation, they need to be in a hypoosmotic environment.

I hope this answer helps.

3 0
3 years ago
Which of these is not a classified organism?
vivado [14]
I got Lizard for this question because lizards are living things.
7 0
3 years ago
Read 2 more answers
What information is not required on the nutritional portion of a food label?
Anna007 [38]

i had this question and it was price

hope this helps


7 0
3 years ago
Read 2 more answers
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