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natka813 [3]
2 years ago
11

The cell membrane is said to be semipermeable because

Biology
1 answer:
Mazyrski [523]2 years ago
7 0

Answer:

The membrane is selectively permeable because substances do not cross it indiscriminately.

Explanation:

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Small sacs in the lung where oxygen and carbon dioxide are exchanged with the blood are called ______________.
Lunna [17]
Hello!
The answer would be Alveoli

In humans, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli in the lungs. Alveoli provide a large surface area for gas exchange.

Hope this helped!
6 0
4 years ago
Help!
Andru [333]

Answer:

1. An organism is a individual animal, plant, or single-celled life form.

2. Habitat, place where an organism or a community of organisms lives, including all living and nonliving factors or conditions of the surrounding environment. Like a forest, lake, coral reef, desert, towns or cities.

3. An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors are animals, trees, plants, and abiotic factors are things that have never been alive. So rock rivers, ponds, man made objects.

4. When a organism depends on another is called symbiotic relationships. There are three different types of symbiotic relationships: mutualism, commensalism, and parasitism. Mutualism: both partners benefit. An example of mutualism involves goby fish and shrimp. The shrimp maintains a burrow in the sand in which both the fish and shrimp live. When a predator comes near, the fish touches the shrimp with its tail as a warning. Then, both fish and shrimp retreat to the burrow until the predator is gone.

5. Pollution(water&air), deforestation, UV Radiation, invasive species.

If an organism went extinct the next generation won't ever be able to see those organisms. If an organism we eat went extinct we would have one less food source which is something that really does not need to happen in today world.

Explanation:

6 0
3 years ago
What do you think makes skin so susceptible to uncontrolled cellular growth?
aalyn [17]
Exposure to more radiation. Human made and from the sun.
4 0
3 years ago
Please help me I’m on a test and I can’t get out of it help please
elena55 [62]

Answer:

nucleus in center of the wall, cell wall, several small vacuoles, and can have cholorplasts.

7 0
3 years ago
What iswrong with this explanation of how
miss Akunina [59]

Answer:

When bacteria are exposed to an antibiotic, such as penicillin, they often mutate.

Explanation:

This means that part of their DNA changes, giving the antibiotic resistance to the bacteria.

In this way, the bacteria can generate a copy of their DNA and transmit it to their offspring, giving their resistance.

On other occasions, a resistant bacterium dies from causes unrelated to the antibiotic, leaving its DNA free.

If other bacteria manage to capture that DNA, it will also acquire antibiotic resistance.

4 0
3 years ago
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