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IceJOKER [234]
3 years ago
5

In a combustion engine, fuel is burned to produce mechanical energy. Which of the following shows that an energy transformation

has taken place?
Biology
2 answers:
erica [24]3 years ago
7 0

Answer:heat is produced

Explanation:

i just had this question

Monica [59]3 years ago
6 0

Answer:

Heat is produced.

Explanation:

Law of conversation of energy and mass these can't be created or destroyed, but can be converted to another form. The fuel/chemical energy is being converted into heat.

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How do genetics (genetic predisposition) and the environment work together to cause substance abuse in individuals? What is the
vampirchik [111]

Answer: The drug abuse is influenced by the environment and exerts influence on the gene expressions.

Explanation:

The genetic make up of the person is decides, which genes will be expressed and develop a trait in an individual. But this genetic expression can be influenced by the environmental factors like food, exposure to sunlight, and others. This study which relate environment with the genetic make up is called epigenetics. No person is drug addict by birth but the consumption of drug can influence the genetic make up and traits in a abuser. So here, the environment is influencing the genetic basis of a abuser.

6 0
3 years ago
Which is a reason cells divide? for apex learning
rosijanka [135]

Answer:

A. To reproduce

Explanation:

Cells divide in two stages: Meiosis - haploid cell division [½ number of chromosomes], and Mitosis - diploid cell division [same number of chromosomes]. Their objective is to produce offspring, which means reproduce.

I am joyous to help. Anytime.

6 0
3 years ago
Read 2 more answers
If a molecule of DNA has 30% Adenine how much of the other bases will be present?
anygoal [31]

Answer:

If a DNA molecule has 30% Adenine the percentage of the other bases is Thymine: 30% Cytosine: 20% Guanine: 20%.

Explanation:

When the percentage that a base has in a DNA molecule is given, the percentage of the other bases can be known using the Chargaff's base pair rule.

A DNA molecule has the information of the genome of a living being, according to a specific sequence of its nitrogenous bases adenine, guanine, cytosine and thymine.

Chargaff was able to establish that in a DNA molecule the ratio of purine : pyrimidine of 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, taking into account the complementarity of bases.

Taking into account the law of the base pair, if in a DNA chain there is 30% of Adenine, in the molecule there is:

  • <em>Adenine 30%. </em>
  • <em>Thymine 30%. </em>
  • <em>Cytosine 20%. </em>
  • <em>Guanine 20%. </em>
  • <em>Total ..... 100% </em>

In this case, the <u>Chargaff rule is useful to determine the percentage of nitrogenous bases that exist in a DNA molecule, knowing the percentage of a single base</u>.

7 0
2 years ago
What is most likely the reason Earth moves in an orbit around the sun?
IrinaVladis [17]

I'm almost sure your answer is going to be "Because the sun's mass creates a gravitational force that pulls earth towards it."

correct me if I am wrong.

5 0
3 years ago
Read 2 more answers
The cell that does not have a cell wall is the
Iteru [2.4K]
<span>The cell that does not have a cell wall is the <em>"animal cell".

</em>Have a wonderful day! :D<em>

</em></span>
7 0
3 years ago
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