Diatoms have cell walls composed of _____.a. silicon dioxide
b. carbon dioxide
c. chitin

Answers

Answer 1

Answer:

The correct answer is a - silicon dioxide.

Diatoms are single celled algae. They have a silica - based cell wall called a frustule, which gives each diatom a particular shape.

Diatoms exist as separate single cells although some may be found in groups or colonies. The ones found in colonies create very pretty forms: leaf shaped, oval , star and even like a period.

Outer shells of diatoms are quite valuable. They are used in industry in the manufacture of toothpaste to give it grit.

Answer 2

Answer:

Answer:

Diatoms have cell walls composed of silicon dioxide.

Related Questions

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in general, a species' _____ niche will be smaller than its _____ niche due to interactions with other organisms in the community.
A box with a mass of 7 kilograms is pushed up a ramp to a height of 5 meters. what is the work done against the force of gravity? assume the ramp has negligible friction.
A MA has opened and used part of a new multidose vial. The MA should ______ the vial.
The cladogram below was created to show the evolutionary relationships between different vertebrates.Which of the following inferences can be made, based on this information?a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.b. Birds and sharks do not share a common evolutionary ancestor.c. Having a bony skeleton did not provide an evolutionary advantage to sharks or ray-finned fish.d. Rabbits and primates diverged more recently than crocodiles and birds.

Small rocks carried along by the river are called?

Answers

Stones or pebbles (double check first though)

Plant and animal cells both have

Answers

Plant and animal cells both have A nucleous

would one be a nucleus?

According to the current theory, the Earth's moon was formed __________.a.
together with Earth
c.
from a portion of Earth
b.
separately from Earth
d.
from a leftover star

Answers

Answer: together with earth.

A point mutation will cause the cell to make an incomplete polypeptide if the mutation results in a stop codon. Is this true or false

Answers

True - if there is a mutation in the genetic code that causes a stop codon then the rest of the code will not be read and translated, resulting in an incomplete polypeptide

What happens during anaerobic cellular respiration?

Answers

During aerobic respiration, the cells still need to release energy without oxygen. therefore, they directly split glucose to form lactic acid. this releases a lot less energy than aerobic respiration and the lactic acid accumulates in your muscles, causing aching.

Answer:

In anaerobic respiration, one molecule of glucose is broken down into two molecules of ethanol (in yeast) or lactic acid (in muscle cells) with a net gain of two molecules of ATP (adenosine triphosphate).

Two molecules of carbon dioxide are released as the byproduct.

It helps in regenerating the NAD⁺ lost in the process of glycolysis.

The overall process is termed as fermentation.

Lactic acid fermentation is catalyzed by the enzyme lactate dehydrogenase and alcohol (ethanol) fermentation is a two-step process which is catalyzed by pyruvate decarboxylase and alcohol dehydrogenase.

The response of a plant to touch isA. photoperiodism.
B. phototropism.
C. gravitropism.
D. thigmotropism.

Answers

D. thigmotropism refers to the response of a plant to contact or touch. It often dictates how plants grow in in a particular pattern, such as the vines growing in fences. The plant Mimosa or tickle me plant does not display thigmotropism but thigmonasty because it does not follow the direction of the stimulus.

Answer:

The answer is D.

Explanation:

Other Questions

Is C4 photosynthesis the photosynthetic process used by some plants to survive in a hot dry climate, like the desert?

The opening in the heart between the left and right atrium that is present in a neonate is known as a:_______

from an energetic perspective, why do secondary consumers usually eat a smaller quantity of food than do primary consumers?

If an enzyme is absent during polypeptide production, what can occur? a mutation polymerization replication gene flow