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Len [333]
3 years ago
12

Help me please i need it​

Biology
1 answer:
Harlamova29_29 [7]3 years ago
4 0

Answer:

B) lighting a match

Explanation:

a chemical change is a chemical reaction involving the rearrangement of atoms. While a physical change can often be reversed, a chemically change typically cannot.

Always remember, if something is being lit on fire then it is a chemical change, since fire breaks the bonds in between the atoms.

Freezing water is a physical change because it can be reversed and does not alter the substance, which is water. a change in state i always a physical change

tearing up a piece of paper is a physical change since nothing on a molecular level has changed. its still paper.

Dissolving sugar in water is a <em>homogenous mixture</em>, meaning that it looks uniform without, however it is still only sugar and water, so it is a physical change.

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Sweat is the result of which life function?
telo118 [61]
<span>Human sweat is a result of our body getting over heated. We sweat through our pores so our temperatures don't go up and as a result we stay at a normal temperature. We may feel hot but that's because we are hot from the heat of something. If we didn't sweat then our temperature would become very high and we would die.</span>
6 0
3 years ago
Read 2 more answers
Why did Barro Colorado Island (formed from a large hill during the flooding of the Panama Canal in 1914) have dozens of species
ahrayia [7]

Answer:

The correct answer is option c.

Explanation:

In the Barro Colorado Island, the mentioned local population of the butterfly species went on to become extinct mainly due to the fragmentation of habitats and the loss of habitats. The host plant on which the butterflies fed could not grow and they started to decline in number and slowly became extinct. Due to this the species of the butterfly also would have got extinct because of the lack of food.

4 0
3 years ago
What are the two categories of behavior? Provide an example of each.
olga nikolaevna [1]

Answer:

Explanation:

The two categories of the behavior includes the operant behavior and respondent behavior.

Operant behavior: The operant behavior can be define as the behavior that is under the control of the consequences. These consequences are likely to control the future frequency of behavior. For example, A child who is allowed to hit other children and take their toy, is likely to be aggressive to other people in the future.  

Respondent Behavior: The behavior which is under the influence of a specific stimuli is a respondent behavior. For example, Snapping of hand away from a hot pan, and Salivation of the mouth due to food.

3 0
3 years ago
Nirenberg and leder used synthetic ‘triplets’ of rna. The purpose of these short rna molecules was to.
dmitriy555 [2]

Take the place of part of an mRNA within the ribosome.

Rna triplets

The nucleotide sequence copy of a gene is present in the mRNA. Each amino acid is represented by a triplet of the four nucleotide bases that make up the genetic alphabet. The relationship between triplet sequences and amino acids is known as the genetic code.

A codon is a triplet of RNA nucleotides that codes for a particular amino acid. To the ribosome, where translation takes place, the tRNA transports certain amino acids. During translation, the anticodons in the tRNA bind to the codons in the mRNA templates. It is essential for the codon and anticodon to interact in order to pair the codon with the appropriate amino acid.

In mRNA, each trio of nucleotides is referred to as a codon, and each codon designates a certain amino acid (hence, it is a triplet code).

To know more about RNA visit:
brainly.com/question/25979866
#SPJ4

7 0
1 year ago
An example of density is a. 2.17 centimeters. b. 2.174 liters. c. 2.17 grams per centimeter.
Mice21 [21]
Density is measured in mass per volume thus C would be the answer.

2.17 g / cm³
5 0
3 years ago
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