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3 years ago

Which characteristics are used to describe air? Select three options.

Biology

2 answers:

beks73 [17]3 years ago

8 0

Answer:

Density, Pressure and Mass.

Explanation:

Air is a fundamental element, being formed by a combination of gases, water vapor and suspended particles, it can be described using the terms density, pressure and mass. It is therefore a vital substance for the maintenance of life on earth, alongside water and soil.

In addition, air is essential for climate, rain distribution and seed dispersion which favor agricultural production. On the other hand, it favors the development of various diseases by viruses, bacteria and microorganisms, which are carried by drafts.

The main elements that make up air are essentially nitrogen (78%) and oxygen (21%) and in small amounts argon (0.94%), carbon dioxide (0.03%), neon (0.0015%). Although it has weight and takes up space in the atmosphere, note that air is a collection of substances that has no color, smell, taste and that we cannot see or touch.

NemiM [27]3 years ago

5 0

Answer:

Density, Pressure and Mass are used to describe air.

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During the presidency of Franklin D.Roosevelt in the 1930s, many acts were passed by the legislature that would affect the role

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President Franklin D. Roosevelt passed numerous acts in the 1930's. Some were the Emergency Banking Act, Social Security Act, and the Soil Conservation Act. All of these acts that were passed by the legislature increased the role of the national government in the economy. The correct answer will be D.

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4 years ago

If the ability to roll one’s tongue is dominant (r) and the inability to roll one’s tongue is recessive (r), what are the possib

natita [175]

The possible genotypes for someone who can roll their tongue are RR or rr, where the R allele is dominant over the r allele.

<h3>What do you mean by Genotypes?</h3>

Genotypes may be defined as the ultimate combination of alleles of those genes which are selected for a particular study or interest.

If R represents the dominant allele and a person rolls their tongue having this allele, while the r represents the recessive allele and a person can not roll their tongue having this allele. To roll their tongue, a person needs only one dominant allele. Thus the person could have genotypes of RR or Rr.

Therefore, the possible genotypes for someone who can roll their tongue are RR or rr, where the R allele is dominant over the r allele.

To learn more about Mendelian Genetics, refer to the link:

brainly.com/question/2240360

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2 years ago

Read 2 more answers

Two genes (R or r) and (D or d), each with a dominant and recessive allele, are

Andrej [43]

Answer:

B. DR, Dr, Rd, dr

Explanation:

This question involves two genes. Alleles D and R are dominant over alleles d and r. These two genes obey the law of independent assortment as proposed by Gregor Mendel.

Based on the question, a genotype RrDd will produce the following combination of gametes following the process of meiosis:

DR, Dr, dR, dr

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3 years ago

angie's mom can roll her tongue will angie be more likely to have that ability or more likely not to have that ability

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Answer:

50 50 chance

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3 years ago

Tetraethylammonium (TEA) is a potent neurotoxin that results in death from respiratoryfailure within 10 to 30 minutes. When a ne

Sever21 [200]

Answer: B voltage-gated potassium channels

Explanation:#

Tetraethylammonium is a pH- potassium channel blocker.

Therefore, it prevents the escape of potassium ions from the axoplasm, which makes it ( axoplam) positive from the rise in potassium ions concentration , since potassium ion is positive charged and intracellular ion . This initiate repolarization which returns to membrane state potential.

Since it is pH -potassium ion blocker; it does not affect the voltage-gated sodium ion channels, so action potential can occur. But after the sodium gated channels were closed,action potential drops but the concentration of potassium rises because :

1. They are naturally intracellular ions

2. They cannot leave the axoplasm because the channels has been shut. Therefore this stabilizes the membrane potential

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