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3 years ago

Which property describes a mixture

Biology

2 answers:

Greeley [361]3 years ago

7 0

Answer:

a combination of different qualities, things, or emotions in which the component elements are individually distinct.

Explanation:

In chemistry, a mixture is a material made up of two or more different substances which are physically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

goblinko [34]3 years ago

6 0

Answer:

c beause irdk sikeeeee a combination of different qualities, things, or emotions in which the component elements are individually distinct.

Explanation:

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Water accounts for 50% to 60% of the weight of the human body.

Sunny_sXe [5.5K]

Answer:

Whats the question? There isn't a question

4 0

3 years ago

Which cross shows both parents having two different alleles for each of two different genes?

shtirl [24]

Answer:

The correct option is Number 1. AaBb x AaBb

Explanation:

Genes can be described as basic hereditary units. The genes are made up of DNA.

A gene carries two alleles for a particular trait. These alleles are present at the same loci in the homologous chromosomes. If the two alleles are similar then they are termed as homozygous e.g AA, BB. If the alleles for a trait are different then they are termed as heterozygous e.g Aa and Bb.

7 0

3 years ago

Micah has straight hair. If he is homozygous for the gene that determines straight hair, what is true of his parents?

alexgriva [62]

Answer:

They have contributed same allele for straight hair.

Explanation:

There are two conditions homozygous and heterozygous. In homozygous conditions both the allele of a particular gene is same in an offspring which means the offspring got two same alleles from its parent for a particular gene and if an offspring is heterozygous for a gene that suggests that the parent has contributed two different alleles for that gene in the offspring.

So If Micah is homozygous for straight hair then it can be concluded that his parents have contributed two same alleles for straight hair genes.

3 0

3 years ago

Answer all 3 wuestions for 25 points and brainliest

mixer [17]

Answer:

17. C " TAAGCTG". It would be the replication strand because A always pairs with T and C always pairs with G, so replication strands just have the opposite base as the original strand

18. Transcription is the name given to the process in which DNA is copied to make a complementary strand of RNA. RNA then undergoes translation to make proteins. The major steps of transcription are initiation, promoter clearance, elongation, and termination.

19. Straight hair is controlled by a recessive allele because as you can see the one where is not shaded is the one that has the most. There are only 1 shaded circle or square, out of the 12 other circles or square that is not shaded. This means that it is the recessive allele because people are less prone to getting straight hair, as you can see in that diagram.

Wasn't this the same question you asked earlier?

3 0

2 years ago

8. What can be concluded from the evidence that coughs and sneezes are natural

andreyandreev [35.5K]

Answer and explanation:

8. What can be concluded from the evidence that coughs and sneezes are natural reflexes and from the evidence that our immune system attacks allergens?

Coughing and sneezing are natural defense mechanisms that consist of the sudden expulsion of air from the respiratory tract, with the intention of expelling any substance harmful to the body.

Allergies are the product of an exaggerated response of the body to the presence of environmental substances, such as dust, fungi and pollen, called allergens. This abnormal response is caused by an immune system previously sensitized to these substances.

Under normal conditions, the immune system is designed to defend an individual against potentially harmful elements. Coughs and sneezes are natural defense mechanisms, which are exaggerated in allergy sufferers.

9. What two possible reasons for the increase in allergies are explained in the passage?

- "Some scientists think our immune systems don't have enough to do ..." "... when our immune system have fewer germs to fight, they can get confused".

According to the excerpt, an immune system that has been inactive due to less contact with germs, looks for a way to attack any substance foreign to the body, which would be a mechanism that promotes the presence of the allergic response.

The confusion of the immune system would be given in some people by reacting in an unusual way to environmental stimuli or food, which do not affect the majority of people.

- ... "weather is warmer for longer periods now, so plants bloom longer .. release pollen, which is a common allergen".

Plant pollen is considered an aeroallergen capable of producing the response with sneezing or coughing in sensitive people.

Other evidence implies an increase in the amount of aeroallergens, as a consequence of the temperature change. A warm temperature for long periods of time promotes flowering in plants more frequently, and there is more pollen dispersed in the environment.

10. What can be concluded about the increase of allergies in the future?

In the text it can be clearly seen how, according to statistical data, the presence of allergies in more people has increased over time.

Many factors may induce an increase in the number of allergic patients in the future, such as the example provided by the passage of children less exposed to germs due to the use of increasingly available medications.

In the past, there were fewer allergies because the immune system remained active to defend the body without the help of drugs.
Additionally, the increase in processed food products may be a factor that in the future increases the appearance of allergies in the population.
Again, the environmental factor plays a determining role. Over time, many climatic changes occur, which, combined with environmental pollution, may lead to increased allergies in the future.

In the images below you will find the information of the article about allergies.

7 0

3 years ago