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MariettaO [177]
3 years ago
5

what are two ways that the size of a population can increase ? what are two ways that the size of a population can decrease

Biology
2 answers:
SIZIF [17.4K]3 years ago
6 0
Import of people, animals, or plants. Birth of new babies, animals, or plants.

Export. Death. 
Sergeeva-Olga [200]3 years ago
5 0

Answer:

<em>For population increase two factors or ways are described which are birth or death, immigration and emigration.</em>

<em>The two ways a population can decrease is through mortality and emigration.</em>

Explanation:

<em>A population's increase is resolved  by  death, birth, immigration, and emigration. When a population's birthrate is higher than its death rate the population size, The population size is rises.</em>

<em>Also,The two factors responsible for the decrease in size of a population are emigration, which is the migration of an individual from a place. and mortality, which is the number of individual deaths in a population over a period of time.</em>

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If there is a new moon at midnight on october 1, when would the next new moon occur
Dafna11 [192]
A new moon occurs once every lunar month, and a lunar month lasts 29.5 earth days. Therefore, the new moon may occur either 29 days after this one, on the 30th of October, or it may occur 30 days after this one, on the 31st of October, since there can not be 0.5 days in a month.
3 0
3 years ago
What two factors will decrease a population?
Serhud [2]

Answer:

The two factors that decrease the size of a population are mortality, which is the number of individual deaths in a population over a period of time, and emigration, which is the migration of an individual from a place. and then also birth rate

Explanation:

8 0
3 years ago
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What two evidences supports the continents were once<br> together?
Bezzdna [24]

Fossil Fuels and Continental drift support the idea that once continents were together.

Explanation:

  • Fossil fuels like plants, animals and rocks are of the identical features were found in the two different continents. For example, identical rocks found in the two sides of the Atlantic ocean, even the mountains in two different continents formed of the identical rocks.
  • The next one is fossils of the seed fern Glossopteris is found across all the southern continents. Hence, there is continental drift happened which caused the separation of continents.

5 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: 
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- 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
Explain how the term atom, covalent bond and molecule are related
Nesterboy [21]

Answer:

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Explanation:

8 0
3 years ago
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