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Yuliya22 [10]
3 years ago
14

Which two scientists are accredited with correctly deducing the double helix model of dna.

Biology
1 answer:
Vika [28.1K]3 years ago
4 0

Answer:

James Watson and Francis Crick

Explanation:

Watson, Crick, Franklin, and Wilkins were four scientists that discovered the double-helix structure of DNA, which served as the foundation for modern biotechnology.

Franklin used X-ray crystallography at King's College London to acquire pictures of DNA, a notion previously proposed by Maurice Wilkins. Franklin's photographs led James Watson and Francis Crick to develop their renowned two-strand, or double-helix, model.

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In what pattern does the flow of energy in the ecosystem take place?
Semmy [17]

The pattern that takes place in the ecosystem regarding the flow of energy is from a higher energy state t a lower energy state. It follows the second law of thermodynamics, the entropy in which all things go into the chaotic state from a higher form into lower form.

4 0
3 years ago
Workers are preparing RUTF peanut butter, and are mixing oil, sugar, peanut butter, and milk powder together. Which ingredient i
astraxan [27]

Answer:

Oil

Explanation:

Oil has the highest fat content amongst all the other ingredients and does not necessarily have all the necessary amino acids.

7 0
3 years ago
Directions
svetoff [14.1K]

Answer:

Explanation:

Australopithecina or Hominina is a subtribe in the tribe Hominini. The members of the subtribe are generally Australopithecus (cladistically including the genera Homo, Paranthropus,[2] and Kenyanthropus), and it typically includes the earlier Ardipithecus, Orrorin, Sahelanthropus, and Graecopithecus. All these related species are now sometimes collectively termed australopithecines or homininians.[3][4] They are the extinct, close relatives of humans and, with the extant genus Homo, comprise the human clade. Members of the human clade, i.e. the Hominini after the split from the chimpanzees, are now called Hominina[5] (see Hominidae; terms "hominids" and hominins).

While none of the groups normally directly assigned to this group survived, the australopithecines do not appear to be literally extinct (in the sense of having no living descendants) as the genera Kenyanthropus, Paranthropus and Homo probably emerged as sister of a late Australopithecus species such as A. africanus and/or A. sediba.

The terms australopithecine, et al., come from a former classification as members of a distinct subfamily, the Australopithecinae.[6] Members of Australopithecus are sometimes referred to as the "gracile australopithecines", while Paranthropus are called the "robust australopithecines".[7][8]

The australopithecines occurred in the Plio-Pleistocene era and were bipedal, and they were dentally similar to humans, but with a brain size not much larger than that of modern apes, with lesser encephalization than in the genus Homo.[9] Humans (genus Homo) may have descended from australopithecine ancestors and the genera Ardipithecus, Orrorin, Sahelanthropus, and Graecopithecus are the possible ancestors of the australopithecines.[8]

5 0
3 years ago
During meiosis homologous Chromosomes can exchange DNA in a process known as
Kisachek [45]

Answer:

crossing over

Explanation:

Crossing over is where homologs can exchange DNA which leads to genetic variation

3 0
3 years ago
Increasing the volume of air that reaches the alveoli and takes part in gas exchange will cause blood pH to:
Karolina [17]

Answer:

B. increase, because the partial pressure of CO2 in the blood will decrease.

Explanation:

The presence of carbon dioxide gas in blood imparts H+ ions due to its reaction with H2O and thereby, lowers down the blood pH.

When more air reaches alveoli, the rate of gaseous exchange is increased. More of the carbon dioxide is removed from the blood and is released out of the body via exhalation.

Removal of carbon dioxide from blood would increase the pH of the blood since the partial pressure of CO2 in the blood would decrease.

8 0
3 years ago
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