Dlaczego obecność drapieżników w przyrodzie jest korzystna?

Classify each one of these examples as a physical or chemical change. Give a reason (observation) of why each example is a speci

alexandr402 [8]

Answer:

Explanation:

a.) is chemical because know the sugar and water are fused together and the chemical com-bond changed

b.) physical, because they will not mix

3 0

3 years ago

Identify the stages of the cell cycle using the drop-down menus. Label A-E

Ostrovityanka [42]

Picture attached

Answer:

A - G1 phase

B - G2 phase

C - S phase

D - Mitosis

E - Interphase

Explanation:

Interphase is all the parts of the cell cycle excluding mitosis, and encompasses G1, S, and G2 phases. Cells spend most of their lives in interphase

G1 is the first gap phase, where the cell is growing and making checks in preparation for mitosis. During S phase (the synthesis phase), the DNA is replicated. This is so a full copy of the DNA can be passed on to the daughter cells.

During the G2 phase, the final checks are made before the cell undergoes mitosis, which is where the cell divides.

6 0

3 years ago

ANSWER QUICK!!! Angelica saw an example of the geologic time scale in her book while studying the history of the Earth. She is i

zalisa [80]

Answer:

to organize the eras and periods of major events of fossils

8 0

3 years ago

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A labeled primer that is known to hybridize to human DNA at 60 different sites in the genome is used to prime human DNA for the

mamaluj [8]

Answer:

The information is not complete in the question to say clearly that how long will be the PCR amplified product. Firstly, it is mentioned that the primer sequence would bind to 60 different sites in the genome. So, there will be 60 different PCR products. Each PCR product could be of different length. This is because we don't know that what is the length of each gene which is going to be amplified in all those 60 cases. Therefore, it is not possible to say what would be the length (in base pairs) of each PCR product as well as the average length. More information is needed to conclude.

3 0

3 years ago

Which describes the process of fermentation?

xxMikexx [17]

Explanation:

<u>anaerobic process that restores NAD+ supply </u>

<u></u>

Within cells, aerobic respiration may not occur due to several factors:

- a lack of inorganic, final electron acceptors
-incomplete or lack of a complete electron transport system
-missing genes for enzymes within the Kreb's cycle

Thus, they utilize other means for the generation of energy in the form of ATP and to replenish NAD+ an oxidized form of NADH, the main electron carrier in glycolysis. Pyruvate is produced in the cytoplasm via glycolysis- it is also used as an electron acceptor in a process called fermentation.

Further Explanation:

overall: C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

In all eukaryotic cells mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate( through the process of glycolysis in the cytoplasm).

Oxidative phosphorylation describes a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD. Electrons continue to move down the chain the energy they release is used in pumping protons out of the matrix of the mitochondria.

This forms a gradient where there is a differential in the number of protons on either side of the membrane the protons flow or re-enter the matrix through the enzyme ATP synthase, which makes the energy storage molecules of ATP from the reduction of ADP. At the end of the electron transport, three molecules of oxygen accept electrons and protons to form molecules of water...

Glycolysis: occurs in the cytoplasm 2 molecules of ATP are used to cleave glucose into 2 pyruvates, 4 ATP and 2 electron carrying NADH molecules. (2 ATP are utilized for a net ATP of 2)
The Citric acid or Kreb's cycle: in the mitochondrial matrix- 6 molecules of CO2 are produced by combining oxygen and the carbon within pyruvate, 2 ATP oxygen molecules, 8 NADH and 2 FADH2.
The electron transport chain, ETC: in the inner mitochondrial membrane, 34 ATP, electrons combine with H+ split from 10 NADH, 4 FADH2, renewing the number of electron acceptors and 3 oxygen; this forms 6 H2O, 10 NAD+, 4 FAD.