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Igoryamba
4 years ago
13

Which cells are more complex ?(circle your answer) A.prokaryotic cells B.eukaryotic cells

Biology
1 answer:
nadezda [96]4 years ago
7 0

Answer:

Eukarotic Cells

Explanation:

Eukaryotic cells are more complex than prokaryotes, and the DNA is straight and found within a nucleus. Eukaryotic cells boast their own personal "power plants", called the  mitochondria.

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Is breathing out a form of excretion?
serious [3.7K]
Yes! carbon dioxide is pushed out by excretion whenever you breath out
7 0
3 years ago
Read 2 more answers
Lipids do not mix with water because of their chemical properties?
m_a_m_a [10]

Answer: Water

Fats are a subgroup of compounds known as lipids that are found in the body and have the general property of being hydrophobic (meaning they are insoluble in water)

water refers to a chemical substance consisting of two hydrogen atoms attached to the central oxygen atom via a covalent bond.

Explanation:

7 0
3 years ago
Which organs are responsible for destroying old red blood cells?
Elan Coil [88]
<span>Spleen is also known as the graveyard of RBC, if it helps u 

1.Stem cells in bone marrow make all blood cells. RBC lives about 120 days. 
RBC are destroyed in Spleen. This process takes place as: 
- RBCs are ruptured. 
- Heme and globin portions separated. 
- Globin > amino acids. 
- Iron transferred in transferrin into the blood > into bone marrow for reuse. 
- Heme > Biliverdin > Bilirubin > liver >small intestine. 



2.Reticuloendothelial cells participate in the destruction of senescent RBC's. The spleen is a well suited site of RBC destruction given that cells must course through 2-3 micron apertures in the walls of splenic sinusoids, which is an ultimate test of cell pliability. Rigid cells are entrapped and phagocytosed. Intra-erythrocyte inclusions are removed during splenic circulation. 
Destruction of RBCs happens within reticuloendothelial cells – NOT in the circulation. Globin and heme get recycled, porphyrin is degraded to bilirubin which is conjugated by the liver and excreted in the gut. Rate limiting step is conjugation. Indirect (unconjugated) bilirubin is result if this doesn’t happen. 
Normally ~10% RBCs lyse while in circulation Þ Hgb gets released into circulation and rapidly disassociates into alpha and beta dimers which are bound by haptoglobin. The Hgb/haptoglobin complex is transported to the liver. If haptoglobin is depleted, free Hgb circulates and is filtered by the kidney. Free Hgb is either reabsorbed by renal tubular cells or excreted as free Hgb in the urine. 


3. Another site reported that 
RBC destroyed in liver and spleen, by macrophages. 2 million destroyed per second. 
Hb is released and iron is recovered and returned to bone marrow.</span>
3 0
3 years ago
How do convection currents in the atmosphere form?
victus00 [196]

Answer:

B. Warming air expands, becomes less dense, and rises. As the air rises, it pushes cooler, more dense air down.

Explanation:

The options D and A can be eliminated because when a gas expands without gaining additional mass, it will become less dense; when a gas contracts without losing mass, it becomes more dense. Therefore, these two options conflict with the idea of density and cannot be true.

Option B is superior to Option C because convection currents are typically portrayed as beginning with the rise of warm air, which displaces/is replaced by cooler, dense air from the upper atmosphere. While Option C is similar, it describes the opposite series of events.

6 0
3 years ago
The intrinsic rate of the atrioventricular av bundle is beats min quizlet
Misha Larkins [42]

The intrinsic rate of the atrioventricular av bundle is 40 to 60 beats per minute (bpm).

<h3>What is the Atrioventricular (AV) and the intrinsic rate?</h3>

Atrioventricular (AV)  can be regarded as the block that  usually altered the  interruption of impulse transmission between the  atria to the ventricles.

And this have the 40 to 60 beats per minute (bpm) as the intrinsic rate.

Read more on intrinsic rate here:

brainly.com/question/25545513

#SPJ11

7 0
2 years ago
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