BIOLOGY HIGH SCHOOL

What is an atom’s atomic number? the number of electrons in an atom the number of neutrons in an atom the number of protons in an atom the number of bonds in an atom

Answers

Answer 1
Answer:

Answer:

the number of protons in an atom

Explanation:

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Answer 2
Answer:

Answer:the number of electrons in an atom the number of neutrons in an atom the number of protons in an atom the number of bonds in an atom

Explanation:

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Vasoconstriction is a term that refers to the contraction of muscle in the walls of the blood vessels, thus causing the diameter of the blood vessel to decrease. Which one of the following types of muscle would be involved in this contraction?A) smoothB) cardiacC) skeletalD) both cardiac and smoothE) both skeletal and smooth

Answers

Answer:

Explanation:

cardiac, since it is releted to heart and blood pressure

AAC –GCC – GTC –CGC – TAGIf a mutation occurs, leaving 12 bases, what is the maximum number of amino acids that could be coded
for by this DNA segment? [1]

Answers

If a mutation occurs, leaving 12 bases, the maximum number of amino acids that could be coded for by this DNA segment is 12.

What is mutation?

"It is any change in the nucleotide sequence of a DNA."

What is DNA

it is a hereditary material composed of repeating units known as deoxyribonucleotide.

What are codons?

It is a three-nucleotide sequence in a DNA or RNA molecule that together code for an amino acid.

What is the maximum number of amino acids that could be coded for by 12 bases?

  • three-nucleotide sequence code for 1 amino acid.
  • 12 nucleotides will code for: (1)/(3) *12 = 4

To learn more about mutation, DNA and amino acid here,

brainly.com/question/13923224

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The maximum number of amino acid would be 4.
***Remember, 3 codon equals 1 amino acid. It just like 12 divided by 3***

How could stem cells prove helpful in the treatment of cardiovascular diseases

Answers

Answer:

Stem cells are self-renewal undifferentiated cells present in the human body. Undifferentiated means that they can divide and differentiate into many cell types of the body depending upon the differentiating potency of the stem cell.

If scientists could regulate the process of differentiation, they can able to differentiate a stem cell into a cell type of interest such as cardiac cell.

These cells are then can be used to replace the damaged or dead cells present in the body.

Thus, it can help in the treatment of diseases such as cardiovascular disease.

stem cell can differentiate to form heart muscle cells.

Before there were national nominating conventions, presidential nominees were selected by

Answers

It was through the practice of the legislative caucus. 

Anxiety disorders can be genetic or caused by a traumatic life event.

Answers

This is absolutely true.

Almost every single person will have anxiety in their life. The most common way to get it is if any of your family members have it. Let's say you had an embarrassing moment in your life when you were younger. The simplest thing could cause you to have anxiety. Although I'm 100% sure about this, it is confirmed that if you have anxiety before you are the age of 20 years old, it is positive you have a family member that has it as well. 

Answer:

This is true.

Explanation:

Hope this helps

Scientific investigations often lead to the formulation of new scientific questions. The observations Charles Darwin made during his time aboard the H.M.S. Beagle prompted him to ask which question? Do living organisms change over time and, if so, how? Are the finches of the Galapagos Islands the same as those on the mainland? Can selective breeding occur in nature? Can the accumulation of gradual changes in a population lead to a new species over time?

Answers

Charles Darwin is known as the man behind the concept of natural selection - that some traits that give relative advantage would appear more and more often, eventually changing the species over time. The correct answer is thus the last one: "the accumulation of gradual changes in a population leads to a new species over time". It especially can't be the first option - we know that organisms chance over time (children become adults) - so we didn't need Darwin to realize that, this is somehting that people have understood for a long time. His discovery was connected to selective breeding, but his major insight was gradual evolution, not the breeding itself.

Charles Darwin observed that the accumulation of gradual changes in a population leads to a new species over time.

Further Explanation:

Scientific experimentations are the logical and practical procedures that determine the efficiency of a particular claim using scientific means. Charles Darwin was the one who gives the theory of evolution that occurred by natural selection. According to Darwin, evolution was descent with modification. There is a common ancestor between the species that changed over time and became new species. Natural selection is the reason why the population grows adapted for well suited to the environment over time.  

 

The pre-existing heritable variation in the group is the prime condition for natural selection to happen in the environment between the species. Natural selection is the process by which the well-suited organism in the population gets selected due to stress in the atmosphere thus evolving the species. In Darwin's book ‘The Origin of Species’, all these facts and information are mentioned, and the ideas of evolution and natural selection are well-reflected.

Learn more:

  1. Learn more about the abiotic factor brainly.com/question/1561256
  2. Learn more about the cellular respiration brainly.com/question/8900186
  3. Learn more about the primary and secondary succession brainly.com/question/4723069

Answer Details:

Grade: High School  

Subject: Biology

Chapter: Ecology

Keywords:

Darwin’s book, origin, natural selection, facts, species, modification, evolving, heritable, variation, ancestor, group, scientific experimentation, practical procedure.
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