Diatoms have cell walls composed of _____.A. silicon dioxide
B. carbon dioxide
C. chitin

Answers

Answer 1

Answer:

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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What kind of mollusk includes snails and slugs?

Answers

The answer would be the Gastropoda

Possessive pronouns can be used as predicate nouns. Select all that applies.my
mine
our
ours
your
yours
his
her
hers
its
their
theirs

Answers

Predicate noun is a single noun or noun phrase that renames the subject of a sentence and follows a form of the verb "to be" or another linking verb

The possessive pronouns that can be used as predicate nouns are :
- My
- His
- Hers
- Her
- Their
- Theirs

Hope this helps

Which statement is true for both photosyntheis and cellular respiration. It occurs in consumers. It occurs in producers. It produces carbon dioxide. It produces oxygen.

Answers

Answer:

It occurs in producers/photoautotrophs

Explanation:

Based on the endosymbiotic theory, what cell would result from the endosymbiosis of a cell with a cyanobacterium?

Answers

The answer is a eukaryotic cell.
According to endosymbiotic theory, the result from the endosymbiosis of a cell with a cyanbacterium is a eukaryotic cell that can produce its own food. Eukaryote refers to the organisms whose cells have a nucleus and other organelles are enclosed within membranes.

Through which microscope were cells first observed?simple microscope
tunneling microscope
compound light microscope
electron microscope

Answers

Cells were first observed through a simple microscope, which is the first option, as Antonie van Leeuwenhoek, a Dutch scientist, used a simple microscope that he designed and built himself to observe and describe microscopic organisms.

What is a microscope?

The history of the microscope goes back several centuries, with various scientists and inventors contributing to its development. One of the most notable figures in the history of microscopy is Antonie van Leeuwenhoek, who is considered the father of microbiology. He was a Dutch tradesman and amateur scientist who lived in the 17th century, and he was the first person to observe and describe microscopic organisms. Leeuwenhoek's microscope was a simple microscope, which means that it had only one lens. The lens was a small, spherical bead of glass that was mounted on a metal plate.

Hence, cells were first observed through a simple microscope, which is the first option.

Learn more about the microscope here.

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Answer:

Simple microscope

Explanation:

What is an experimental curve?