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Vera_Pavlovna [14]
3 years ago
11

Why do biologists believe glycolysis evolved before the krebs cycle and the electron transport chain?

Biology
1 answer:
ollegr [7]3 years ago
4 0

Answer:

Glycolysis evolved before Kreb's cycle and Electron Transport chain. This view is supported by following facts:

  • Glucose cannot enter the mitochondria and it needs to be broken  down into pyruvate in the cytosol by the process of glycolysis.
  • Pyruvate then forms acetyl CoA that enters the mitochondria where it undergoes Kreb's cycle.
  • The Electron transport Chain occurs by passing of electron and finally donating it to the electron acceptor oxygen. The molecules of NADH  produced in the preparatory phase of glycolysis provides the electron for electron transport chain.
  • Thus Glycolysis must have evolved before Kreb's Cycle and Electron Transport Chain otherwise the raw materials for both the processes would not have been available.

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[100 POINTS]
spayn [35]

I hope this helps :)

8 0
3 years ago
Which of Virginia's watershed protection programs builds structures that protect areas from flooding?
Blababa [14]

Answer:

The Dam Rehabilitation Program

Explanation:

The Small Watershed Rehabilitation Amendments of 2000, which was well termed as the Dam Rehabilitation Program is mainly an amendment to PL-566 giving power and privilege to the Secretary of Agriculture to give aid to possessor of public dams created formerly under PL-566, PL-534, the RC&D Program and the Pilot Watershed Program.

This program was established in respect to the high levels of aging dams (greater than 11,000) esrablished across the nation from 1948 with a increasing amount that requires rehabilitation to keep up with the several importance they provide.

Dam Rehabilitation:

In Virginia, 150 dams is considered as belonging to the state’s landscape/infrastructure via the PL-566, PL-534, and Pilot Watershed programs. One care infer that, one-third of these dams requires maintenance, if not repaired, could lead to high dangers of environmental, economic, and social effects. The dams were constructed to preserve agricultural lands and small towns and regions from the endangering impacts of flooding. It also acts as a source of water supply and recreational opportunities, protecting fish and wildlife habitat, and preserving of water quality.

Some of the dams in the Dam Rehabilitation program in Virginia includesMarrowbone Creek in Henry County; Inch Branch, Robinson Hollow, Toms Branch, Mills Creek, Todd Lake, and Hearthstone Lake in Augusta County; and Royal Lake, Lake Barton, Woodglen Lake, and Huntsman Lake in Fairfax County.

4 0
3 years ago
Read 2 more answers
One of the seed banks has been storing seeds of a rare and endangered plant to keep the seeds fresh.120 of the seeds of this pla
lianna [129]

Answer:

25%

Explanation:

According to this question, a seek stored seeds of a rare and endangered plant. In order to ensure that the seeds remain fresh, 120 seeds are selected to be grown. However, out of these 120 seeds, only 90 germinated. This means that only 90 of 120 seeds are fertile.

This further means that (120-90) = 30 seeds are infertile and hence, could not germinate. In percentage, this can be represented as:

30/120 × 100

= 1/4 × 100

= 100/4

= 25% of the selected seeds are infertile.

5 0
2 years ago
What is the last process to occur in the epiphyseal plate?
Serggg [28]
The last <span>process to occur in the epiphyseal plate is ossification</span>
7 0
3 years ago
Human blood may contain either or both of two antigens, a and
Molodets [167]
Type O is the remainder after subtracting types A, B and AB.

so percentage of type O blood supply
= 100%-(28+15+10)%
= 100% - 53%
= 47%
6 0
2 years ago
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