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Cyanobacteria, also known as blue-green algae, are a kind of bacteria found in many lakes. These organisms make their own food through photosynthesis. Small animals including mayfly larvae eat the cyanobacteria, and small fish such as yellow perch eat the larvae. The small fish provide food for larger fish, such as walleye.

Describe a model you could use to show the transfer of energy within the lake ecosystem. In your description of your model, make sure you include the position of each organism identified in the paragraph.

Answer:

Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see. They have the distinction of being the oldest known fossils, more than 3.5 billion years old, in fact! It may surprise you then to know that the cyanobacteria are still around; they are one of the largest and most important groups of bacteria on earth.

Many Proterozoic oil deposits are attributed to the activity of cyanobacteria. They are also important providers of nitrogen fertilizer in the cultivation of rice and beans. The cyanobacteria have also been tremendously important in shaping the course of evolution and ecological change throughout earth's history. The oxygen atmosphere that we depend on was generated by numerous cyanobacteria during the Archaean and Proterozoic Eras. Before that time, the atmosphere had a very different chemistry, unsuitable for life as we know it today.

The other great contribution of the cyanobacteria is the origin of plants. The chloroplast with which plants make food for themselves is actually a cyanobacterium living within the plant's cells. Sometime in the late Proterozoic, or in the early Cambrian, cyanobacteria began to take up residence within certain eukaryote cells, making food for the eukaryote host in return for a home. This event is known as endosymbiosis, and is also the origin of the eukaryotic mitochondrion.

Because they are photosynthetic and aquatic, cyanobacteria are often called "blue-green algae". This name is convenient for talking about organisms in the water that make their own food, but does not reflect any relationship between the cyanobacteria and other organisms called algae. Cyanobacteria are relatives of the bacteria, not eukaryotes, and it is only the chloroplast in eukaryotic algae to which the cyanobacteria are related.

Explanation:

How long does your cerebrum take to fully develop?

The nervous system includes the brain. At what level of organization is the brain?
A.Cell
B.Tissue
C.Organ
D.Organ system

Which of these processes describes the effect Earth’s atmosphere has on Earth’s geosphere?
A. Animals losing their habitat from deforestation
B. Ocean levels rising from glaciers melting
C. The sun evaporating water from a lake
D. Widening of streams from severe weather

Which is the final event that occurs when a star is forming?

The outer layer of the star expands.
Gravity pulls gas and dust together.
A black hole forms as the core collapses.
Nuclear fusion begins under high pressure.

Into which layer of the atmosphere are jet airplanes able to travel?
A. The stratosphere
B. The thermosphere
C. The mesosphere
D. The troposphere

meaning of condom ...........​

Which fat is absorbed by the villi in the small intestine?
Unsaturated fat
Saturated fat
Both

Label each part of the cell! 100 POINTS!!

The ______ connects the third and fourth ventricles and is found in the mesencephalon (midbrain). Multiple choice question. cerebral aqueduct reticular formation periaqueductal gray matter superior colliculus

which statement explains one way that minerals form? o they are mined from rocks. o they are produced from molten minerals. o they are grown in a laboratory. o they are washed up on a seashore. HURRY IM TIMED!!!!!!!!

what is not a branch of biology

Which step in the process of photosynthesis is dependent on light energy?
A.splitting of water into hydrogen and oxygen
B.combining carbon and oxygen into carbon dioxide
C.splitting carbon dioxide into carbon and oxygen
D.combining hydrogen and oxygen to form water

what do bactieria have in common with the cells of other living organism

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In the simulation I was given,
At first, I was a predator that was eating white and black peppered moths, on white bark.
Then, I was a predator eating white and black peppered moths, BUT on dark bark.

ANSWER TWO QUESTIONS,
Test variable (independent variable):
Outcome variable (dependent variable):

2. You observe a cell under a microscope and notice a cell wall. You conclude that this cell could be
O A plant cell
O An animal or plant cell
O A plant cell or a bacterial cell
An animal cell

The function of enzymes is to -
A
store oxygen in muscle.
B
change the rate of reaction.
с
form the cell membrane.
D
be building blocks for cells

what are the symptoms of people living with cancer?​

What type of receptors are used to sense pressure and touch on the skin

Which is a way that RNA diffet's from DNA?

A. uracil base

B. 3-stranded

C. no phosphate group

D. connected by peptide bonds

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If a person is at rest, they have a respiratory rate of 12 breaths per minute and if they mobilize 500 ml each inhalation and exhalation, which is their tidal volume. In one minute you will mobilize a total of __________ml.

If a person in moderate activity has a respiratory rate of 18 breaths per minute and if in each inhalation and exhalation he mobilizes 500 ml, which is his tidal volume. In one minute you will mobilize a total of __________ml.

What happens when enzymes are heated to a high temperature? The enzymes die.
The enzymes' amino acid sequence changes.
The enzymes remain the same.
The shapes of the enzyme are denatured.

Which of the following should NOT be included in your conclusion?
A) A statement of whether your hypothesis was correct or not
B) A scientific explanation for
your conclusion
C) A list of materials required for the experiment
D) All of these should be included in the conclusion

Adding an organism to a food chain does not affect the other members of the food chain, but removing an organism does.
Please select the best answer from the choices provided
Тruth or false

Label the following with 1,2,3 for the Newton’s law represent by each description.

1=Newton’s first law
2= Newton’s second law
4= Newton’s third law

Left-handedness (r) is recessive in humans and right-handedness is dominant (R).
Tracy, a left-handed woman, and whose mother and brother are also left-left handed,
marries Sa who is right-handed. Sam's mother is left-handed and his father and sister
are right-handed. What is the expected genotypic ratio of the children Sam and Tracy
might have?
ORr:2rr:ORR
1Rr:2rr:1RR
2Rr:2rr:ORR

What role does photosynthesis play in the flow of energy through ecosystems?

1.) It converts sunlight into chemical energy

2.)It uses ATP

3.)It converts chemical energy into carbon dioxide

4.)all of these

Which of the following best describes the compositional layers of the earth? a. All layers of the Earth below the crust are liquid. b. The only liquid layer of the earth is the mantle. c. The crust floats on top of the outer core. d. Some layers of the earth are liquid, and some are solid. Please select the best answer from the choices provided A B C D

Suppose a volcano sent large amounts of ash into the air that blocked the sunlight over a large area of ocean water for several months. Would this affect life in the ocean? Explain why or why not.

Carl Woese developed his system of classification among groups of organisms based on DNA sequences of

A proton is
Which of the following completes the sentence above?
A
located in the orbital of an atom.
B
a part of an atom that does not have a charge.
C
a part of an atom that can lose an electron and become negatively charged.
D
the part of an atom counted to determine the atomic number of an element.
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