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kolezko [41]
2 years ago
10

Who proposed the polynucleic model, stating that DNA and RNA were composed of nucleotides.

Biology
1 answer:
Paraphin [41]2 years ago
4 0
LeveneChargaffWatson and CrickNirenberg and Matthaei
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Only adult ticks of the genus Ixodes may feed on humansa. True b. False
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Answer: False

Explanation:

Ticks are the external parasites which survive by feeding the blood of the birds, reptiles, amphibians and mammals. Various species of the ticks are distributed world wide. They colonize and live in the countries with warm and humid climatic conditions. The moisture help them to undergo metamorphosis. There are many species in the families of lxodidae (hard ticks) and Argasidae (soft ticks) that are active parasites and are capable of causing diseases in humans.

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A swimmer sprints a short distance for a competition, the swimmer is not able to take in enough oxygen to make the ATP needed fo
OverLord2011 [107]

A swimmer sprints a short distance for competition. The swimmer is not able to take in enough oxygen to make the ATP needed for the sprint. Which of the following processes is most likely going to occur in the swimmer's muscle cells during the competition? (2 points)

A. Aerobic respiration would continue until oxygen is no longer available, leading to cell death.

B. Aerobic respiration will continue to make the same amount of ATP since oxygen is not required.

C. Anaerobic respiration would be used to produce small amounts of ATP in the absence of oxygen.

D. Anaerobic respiration will produce more ATP than the process used in the presence of oxygen.

<u>Answer:</u>

A swimmer sprints a short distance for competition. The swimmer is not able to take in enough oxygen to make the ATP needed for the sprint. Anaerobic respiration would be used to produce small amounts of ATP in the absence of oxygen and it is the process happens in the swimmer's muscle cells during competition.

<u>Explanation:</u>

  • A Swimming sprinter will spend his maximum energy while to cover a short distance in his competition. Quickly he will reduce his oxygen level.
  • Oxygen will produce an ATP molecule (Adenosine Triphosphate) which is required for a sprinter.
  • The ATP molecule will produce energy for the cells. Aerobic respiration takes place only when in the presence of oxygen.
  • While swimming they will not get enough oxygen so the Anaerobic respiration takes place to produce ATP molecule.

7 0
3 years ago
a biologist discovers a new unicellular organism and classifies it as a prokaryote. the cell is very small, contains a cell memb
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The organism is a eukaryote, because it has a cell membrane, a cytoplasm, and DNA.

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Explanation:

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