Answer:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
Explanation:
Answer:
This is because of the difference in the structures on the apical surface to those on the basal surface.
Explanation:
Epithelia cells are the cells lining the surface of the body, body cavities and hollow organs. They are like barriers existing between the body and the external environment. Thereby, playing roles like protection, absorption, excretion etc.
Answer:
Your heart changes its rate depending on the activity, so that it can carry blood to your muscles, and therefore it needs to beat stronger if you are performing some exercise, or not so strong if you are sleeping, for example.
Explanation:
Your heart is continuously beating to keep blood circulating throughout your body.
So, here it is why your heart changes its rate: Its rate changes depending on your activity level; it is lower while you are asleep and at rest and higher while you exercise to supply your muscles with enough freshly oxygenated blood to keep the functioning at a high level.
And how: depending on your activity level, your heart has to pump enough blood to your muscles. Blood carries needed oxygen and other nutrients. Muscles need more blood sugar than any other tissue especially when working hard. To supply your muscles with oxygen your heart needs to beat faster, and this builds up your heart muscles.
Birds migrating from colder to warmer climates - swarm behavior
Sharper vision to see at night - Nocturnal behavior
Cat hissing at it’s enemy - Predation Defense
A person consuming only those crops they produce while farming - Cultural Adaptation