The substance that typically provides rigidity to fungal cell walls, and is also found in the external skeletons of insects and other arthropods, is called ____.

Answers

Answer 1

Answer:

Answer:

Chitin

Explanation:

Chitin is a natural biopolymer that is made of the N-acetylglucosamine, modified glucose.

Chitin is an important polymer mainly for the fungi and the arthropod insects as it is present in the cell wall of the fungi and the exoskeleton of the insects.

The chitin provides a protective function to this organism that the digestive enzymes cannot degrade this chitin but only the symbiotic bacteria can digest eat therefore they are sometimes avoided to be eaten.

Thus, chitin is the correct answer.

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What is the function of the lung in a frog

Answers

A frog's lungs are involved in many functions, including breathing, vocalizing and hearing. Brown University explains that frogs use their lungs in the same way humans do to take in air. The breathing process is different, though, because a frog does not have ribs or a diaphragm like a human does, and these body parts help control air flow.

Antonym for Food Chain?

Answers

Food Web
And Food Cycle

Hope I Helped You!!! :-)

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I think that an antonym for Food Chain is food web.

_______ cause(s) populations to change over time.Natural disasters
Natural selection
Weather
Genes

Answers

Natural selection causes populations to change over time,

A come,a seats 250 people. If 170 people are in the cinema, what percentage of the seats are filled?

Answers

Given that there are 250 seats in the cinema and they are 170 people sitting on the seats provided, in order to get the percentage we will first arrange the given details.

250 seats

170 seats filled

X = percentage

Take 170 / 250

So it will be 170 ● 100 = 17,000

Next, 17,000 250 = 68

So we will have 170 is the 68% of 250. Therefore, 68% of the seats in cinema are filled.

Lake Èrie, U.S., is the shallowest of the Great Lakes. The shallowness allows enhanced algae and plant growth. This algae and plant growth is O a biotic factor that keeps salinity at the right levels O a biotic factor that impacts food chains and trophic levels an abiotic factor that helps keep species in check O an abiotic factor that keeps waters fairly warm

Answers

Answer: A biotic factor that impacts food chains and trophic levels

Explanation: Algae is at the bottom of the food chain, but provides all the energy for each organism in the ecosystem through photosynthesis

a major reason that human have negatively affected the environment in the past is that they

Answers

Cars and other forms of transportation emit carbon dioxide and other harmful chemicals. Many trees are cut down, which reduces the amount of oxygen. Global warming causes the icecaps to melt, which means that some species in the arctic are dying out. Hope this helps!

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