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Sphinxa [80]
4 years ago
8

. Which of the following is a chemical reaction? A. breaking a glass pane B. freezing water C. digestion of food D. cutting down

a tree E. evaporation of rubbing alcohol
Biology
2 answers:
katen-ka-za [31]4 years ago
8 0

Answer:

C. When we digest food there are tons of chemical reactions occurring in the process, they would have to break down the food which is a chemical reaction.

ad-work [718]4 years ago
7 0

Answer:

C. digestion of food

Explanation:

in a chemical reaction the substance changes composition and the reaction is mostly irreversible.

option C: digestion of food is a chemical reaction which changes the composition of the food we eat. Enzymes and other substances react with the food and turn it into soluble substances which the body can easily use.

option A: breaking glass does not change the composition of the glass plane. Its a physical reaction

option B: freezing water changes the state of water but the composition is still     the same, its a physical reaction as well.

option D: cutting a tree does not change the composition of the wood. This, too, is a physical reaction.

option E: when a liquid evaporates it changes into a gas, which is a change in the state of matter (just like water into ice), this also does not change the composition of alcohol.

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Nitrogen atoms are part of the structure of some organic molecules, such as all amino acids and some modified carbohydrates. Wha
zalisa [80]

Explanation:

The nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.

Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar does nitrogen bases which may contain single to double bond ring.

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

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3 years ago
What is the main purpose of the nervous system?
weqwewe [10]
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5 0
3 years ago
Question 1. Construct a crossword puzzle of your own using the keywords. (Chapter - 18 Pollution of Air and Water)​
Vera_Pavlovna [14]
can you send keywords?
8 0
3 years ago
A population of Anolis lizards lives on the mainland. During a storm, three groups of Anolis migrate to three islands, one large
natka813 [3]

Answer:

(i) Small island

(ii) Large island

(iii) Option-3

Explanation:

In the given question, the three population of the Anoles Lizards migrated to three islands of different size.

(i) Genetic drift is a random or by the chance process which changes the frequency of the alleles in the population. The change in the frequency of the allele can be easily observed in the small population therefore the small island with the smallest size of the population will have the strongest genetic drift.

(ii) Heterozygosity of alleles that is with a dominant and a recessive allele is the result of the exchange of alleles in the population. The size of the population is finite on the island therefore the heterozygosity is not introduced in the small population but in a large population, it can be introduced as the mating is random.

(iii) The genetic drift is strongest on the small island therefore L2 allele can be easily influenced by this effect. The selection coefficient is very small that is 0.002 therefore no mutation is occurring on the island.

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How much of the world's oxygen is produced in the Amazon rainforest?
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Answer:

About 76% of the oxygen

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