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Aleksandr [31]
3 years ago
9

Organisms, like bacteria or lichen, that can live on bare rock and form soil are called

Biology
1 answer:
vovikov84 [41]3 years ago
8 0
Organisms, like bacteria or lichen, that can live on bare rock and form soil are called Pioneer species. In primary succession pioneer species like lichen, algae, bacteria , fungi as well as other abiotic factors like water and wind, start to normalize the habitat. This type of successions begins on rock formations, such as mountains or volcanoes, or in a place with no organisms or soil. 
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there are multiple chickens and rabbits in a cage there are 72 heads and 200 feet inside of the cage how many chickens are in th
schepotkina [342]
The answer is 44 chickens and 28 rabbits.

We have a system of two equations.
x - the number of rabbits
y - the number of chickens

Both chicken and rabbit have only 1 head, so the first equation is: x + y = 72.
Since rabbits have 4 legs and chickens 2 legs, the second equation is: 4x + 2y = 200.

Now, let's solve the system:
x + y = 72
4x + 2y = 200
___________
y = 72 - x
⇒ 4x + 2 · (72 - x) = 200
4x + 2 · 72 - 2 · x = 200
4x + 144 - 2x = 200
2x + 144 = 200
2x = 200 - 144
2x = 56
⇒ x = 56 ÷ 2 = 28
So, there are 28 rabbits.

Since
y = 72 - x = 72 - 28 = 44,
there are 44 chickens.

7 0
3 years ago
List by size: gene, cell, chromosome, atom, nucleus, base subunit, nucleotide
Makovka662 [10]
Cell nucleus chromosome gene nucleotide base subunit atom
4 0
3 years ago
Which of the following best describes passive immunity?
sweet-ann [11.9K]
All of about is the answer
7 0
3 years ago
Explain how the increased flammability of chaparral shrubs is a beneficial adaptation.
MArishka [77]

Answer:

Trees will compete with shrubs for light and space so by adapting for increased flammability, chaparral scrubs promote natural wildfires to eliminate their competitors. While these fires destroy the trees, the shrubs are still able to germinate afterwards.

Explanation:

6 0
3 years ago
A group of scientists is studying the internal parts of a cell. Which microscope is most appropriate for these scientists to use
Lady bird [3.3K]
The most appropriate microscope for studying the internal parts of the cell is ELECTRON MICROSCOPE. The correct option is B.
Electron microscope, which is a compound microscope is usually used to study the internal environment  of the cell because of the easiness with which one can easily distinguish the cell organelles from one another. Electron microscope gives great clarification of the cellular components and allow scientists to observe minute details about cellular structures. Electron microscope usually magnify specimens to one million times of their real sizes. 
4 0
3 years ago
Read 2 more answers
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