The answer is diffusion.
The most important mechanism that enables oxygen and carbon dioxide (but as well other small molecules such as glucose, amino acids, wastes) across capillary walls is diffusion. Diffusion is a net movement of molecules through some barrier from an area of high concentration to the area of low concentration. When blood rich in oxygen reaches capillaries close to the cell, now there <span>is </span>more oxygen in the capillaries than in the cells and by diffusion, oxygen will pass capillary walls and enter the cell. Since blood in capillaries lacks in carbon dioxide, it will easily leave the cells and enter the blood. It should be taken into consideration that capillary walls may be fenestrated, continuous, and discontinuous which can affect movement through them.
Answer: 2
explanation: enzymes are known as proteins used to break down proteins and other macromolecules during digestion
Answer:
A. Populations were separated through geographical isolation.
Explanation:
Explanation:
On average, the temperatures are always high. A lot of rain (rainy season) falls in the month of: July, August and September. Bamako has dry periods in January, February, March, April, November and December. The warmest month is April with an average maximum temperature of 39°C (102°F).
A lot of rain (rainy season) falls in the months: June, July, August and September. Bamako has dry periods in January, February, March, April, November and December. On average, August is the wettest month with 296.0 mm (11.65 inch) of precipitation.
Answer:
The correct answer is A) pharmaceutical companies generally do not allocate a lot of money to research for new antibiotics because they are not very profitable.
Explanation:
Bacterial resistance to antibiotics can occur due to various reasons
1 Bacterial resistance to antibiotics is generated due to overuse in agriculture and over prescribing by doctors in addition to other reasons.As a result the bacteria becomes adapted to those antibiotics.
2 Some bacteria choose to have a mutation that makes them resistant to effects of antibiotics.
3 In some bacteria random mutation occurs that make them resistant to the effect of antibiotics.