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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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Which of the following is a type of mass
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Answer:

gravity

Explanation:

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3 years ago
Why are frogs said to have “two lives” ?
Vladimir79 [104]

Answer:

  • One because they are amphibians
  • two because amphibian means two lives
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Explanation:

Frogs begin their lives in the water as eggs and then tadpoles and when they are fully developed they live on land.

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6 0
3 years ago
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fomenos

Answer:

coevolution

Explanation:

Coevolution refers to the process where two or more species modify each other's evolution via natural selection. Darwin mentioned how insects and flowering plants could coevolve by reciprocal evolutionary modifications. Coevolution has firstly been associated with mutualism between species including, for example, birds and flowering plants. However, coevolution may also involve host-parasite relationships, such as associations involving parasitic organisms and their sexually reproducing hosts. Finally, there are situations where coevolution involves both parasitism and mutualism (i.e., antagonistic coevolution).

4 0
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Andesite has large crystals surrounded by fine-grained minerals. Which term describes the texture of andesite?
Ivanshal [37]
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satela [25.4K]

Answer:

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