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Snezhnost [94]
3 years ago
12

Diatoms have cell walls composed of _____.

Biology
2 answers:
Stels [109]3 years ago
6 0
Diatoms have cell walls composed of silicon dioxide.

A. silicon dioxide.
Gnesinka [82]3 years ago
6 0

Answer: A. Silicon dioxide

Diatoms are unicellular algae that are found in the freshwater, brackish and marine water. These organisms exhibit cell wall that are made up of silica that is hydrated silicon dioxide. This type of cell wall is called as frustule. The cell wall is divided into two valves called as thecae.

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Some types of fish can generate an electric field around their body to communicate with other individuals of the same species (l
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Answer:

D. physiological mechanisms are the basis of behaviors.

Explanation:

The example of the development of electric fields as part of the communication between some fish, shows the interrelation that exists between physiology and behavior. This physiological factor that fish have has an impact on their behavior. However, it is necessary to recognize that physiology does not act by itself, but needs to receive a stimulus from the surrounding environment. This way of communicating is called  electrocommunication, a fish generates through its physiology an electric field and a second individual receives that electric field with its electroreceptors.

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4 years ago
People try to conserve some resources, like fossil fuels, because they are
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Answer:

B. processes to make them take longer than a human's lifetime

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3 years ago
1. Refer to the data in Model 1.
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Answer:

11 males, 25%  

Explanation:

Eleven of the 44 males in this study are taller than 175 centimetres, which makes it one fourth of the total that is 25%. See below:  

simplify the fraction \frac{11}{44}  

= \frac{1}{4}  now multiply it by 100 to convert to a percentage value.

= 25%

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3 years ago
Which of the following happened partly in response the fire on the Cuyahoga River? Select two correct answers.
dlinn [17]

Answer:

- Congress passed the Clean Water Act into law.

- The National Environmental Policy Act was passed, which led to the formation of the EPA.

Explanation:

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Answer: The answer is A. Increaed use of fossil fuels.

Explanation:

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