The important point is that the surface area to the volume ratio gets smaller as the cell gets larger and as volume increases, surface area to volume ratio decreases. The larger a cell, the less easily it can get rid of waste and it also has more trouble getting water, nutrients and gases in. That is why we do not see giant cells. Instead we see multiple cells in larger organisms.
One way to increase surface area is to flatten the cell. That is why red blood cells are flat discs, instead of spheres. Another way is elongation. That is why many bacteria are rod shaped, and why neurons are elongated. In fact, the human body relies on the same principle to adapt to climate. Long tall and lean folks with long arms and legs live in East Africa, because such shapes increase surface area to get rid of excess body heat to avoid heat strokes. Europeans and Asians adapted to cold climates, in contrast, have shorter arms and legs and rounder torsos to minimize surface area. to conserve body heat.
Answer:
Oxygen helps the body's cells function normally. The cycle of carbon dioxide and oxygen on Earth is dependent on plants and animals. Plants provide the oxygen that animals and other living things need to survive. Animals and other living things provide the carbon dioxide that plants need to make their own food.
Explanation:
Contracting an std could affect your dream of having a future family because some stds can make you sterile and you will would never be able to have children.
A phylogenetic tree based on morphology can be constructed using the presence or lack of characteristics. In this illustration, all aliens except the outgroup possess a spring tail, all aliens possess a fourth eye, two aliens possess two tails, and one alien has a grasping hand. The evolutionary relationships between these organisms can be hypothesized using these traits.
Aliens:
- We can determine whether the following traits are present in the remaining aliens by using the group of aliens with the tail stalk as our test group.
- Out group: a group that is maintained apart from the clade but is yet connected to it.
- If we provide these aliens alphabets for ease of understanding, then aliens will be like in order.
- We can use the group of aliens with the tail stalk as our test group to see if the following characteristics are present in the remaining aliens.
- A group that is kept separate from the clade while yet being affiliated with it is known as an out group.
- The aliens will appear to be in order if we give them alphabets for simplicity.
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