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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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Rosa drew a flow chart of the carbon cycle. Flow chart of the carbon cycle with 4 boxes connected by arrows. Box 1: carbon dioxi
leonid [27]

Answer:

(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.

Explanation:

<em>(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste. </em>

<em>(b) X: Decomposers return carbon to the soil and release waste. Y: Producers undergo photosynthesis. </em>

<em>(c) X: Decomposers take in carbon dioxide. Y: Producers absorb carbon through their roots. </em>

<em>(d)X: Producers absorb carbon through their roots. Y: Decomposers take in carbon dioxide. </em>

<u>Box 2 (X)  would be the process through which producers fix carbon dioxide to produce their own food, the carbohydrate. T</u>he process is otherwise known as photosynthesis and can be represented by the following equation:

6CO_2 + 6H_20 --> C_6H_1_2O_6 + 6O_2

<u>Box 4 (Y) would be the process of decomposition.</u> Both producers and consumers eventually die and decompose in the soil. During this process, some of the carbon returns to the soil as organic matters while the process of microbial decomposition releases carbon dioxide into the atmosphere.

The correct option would be (a).

3 0
3 years ago
Suppose the great, green galoofus lizard has 28 chromosomes in the nucleus of its unfertilized eggs. Predict how many chromosome
Amiraneli [1.4K]

Answer: 56

Explanation:

Because an unfertilized egg has half the chromosomes of a fertilized egg. The fertilized egg then splits, and continues splitting until the lizard is born. Always remember, whenever a question  talking about an unfertilized egg, it has half the chromosomes of a fertilized egg. One more side note, it doesn’t matter what body part you talk about. A skin cell will have the same number, and identical chromosomes compared to a heart cell. (So long as it’s the same organism, if it isn’t, but part of the same species, it will have the same number of chromosomes, but it may have a unique set of chromosomes). If you want me to go into detail, I can, just respond to this answer.

8 0
3 years ago
100 POINTS! ! Hydrocarbons are not very soluble in water because
vesna_86 [32]

Answer:

covalent, which repel water molecules

they contain ions, which make the entire molecule hydrophilic

they are less dense than liquid water, so they float on the surface

most of their bonds are nonpolar covalent, so they are not attracted to water

Your answer

Explanation:

5 0
3 years ago
aerobic respiration results in the production of large amounts of lactic acid. How does this impact the body? What is one real l
neonofarm [45]
It’s actually called anaerobic cellular respiration because you’re not using oxygen. For example, when you sprint you can’t breathe very well, so you’re not inhaling as much oxygen you need to make that energy for you to move. Your muscles will go into lactic acid fermentation, and the result of that is energy (ATP) along with lactate (lactic acid), and you will probably start feeling pain as the lactic acids build up.

Hope that helps!
7 0
3 years ago
1. A man with hemophilia (a recessive, sex-linked condition) has a daughter without
garik1379 [7]

A man with hemophilia (a sex-linked recessive condition) has a daughter without hemophilia, the probability of their children having hemophilia is 50%, out of 4 children probably 2 will have hemophilia and 2 will not have hemophilia.

<h3>What is recessive and dominant?</h3>

The dominant term is related to the genetic transmission of a trait and is represented, in biology, by a capital letter (A, B or V). While recessive, represented by a lowercase letter (a, b or v), they represent genetic traits transmitted only in the absence of the dominant gene.

With this information, we can conclude that Recessive genes produce proteins considered “defective” as they become inactive. That is, they are hidden (recessive) with the presence of a dominant gene manifesting their characteristics in the absence of their dominant allele.

Learn more about Recessive genes in brainly.com/question/15481938

#SPJ1

5 0
2 years ago
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