BIOLOGY HIGH SCHOOL

The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating?A.)anatomical isolation
B.)temporal isolation
C.)geographic isolation
D.)behavioral isolation

Answers

Answer 1
Answer: B.)temporal isolation
Answer 2
Answer:

Answer:

b

Explanation:

temporal isolation

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suppose a cell wishes to make a protein that has 100 amino acid. How many water molecules will be created in the making of this small protein?

Answers

The answer is 99.

Amino acids contain a carboxyl group (carbon-containing) and an amino group (nitrogen containing). Proteins are made by forming peptide bonds between the carboxyl and amino group of amino acids.
If a protein is made of 100 amino acids, that means there are 99 peptide bonds (because the last, 100th amino acid will not bind the next (101st) amino acid). For each peptide bond that is created, one oxygen atom and two hydrogen atoms are taken. Therefore, one water molecule is created for each peptide bond. If there are 99 peptide bonds, 99 water molecules are created.

Considering that we are all made up of the same 4 nucleotides in our DNA, the same 4 nucleotides in our RNA, and the same 20 amino acids in our proteins, why are we so different from each other?

Answers

The order that the nucleotide are arranged in form different 'codes' to create traits.RNA in human is used for transporting,and making the amino acids proteins.

The order of amino acid proteins also changes the polypeptide formed, changes more traits and characteristics.

Nucleotide in DNA contains four different nitrogenous bases-

  • Thymine
  • Cytosine
  • Adenine
  • Guanine

Pyrimidines: Cytosine and thymine each have a single six-member ring.

Purines:Guanine and adenine each have a double ring made up of a five-atom ring attached by one side to a six atom ring.

Therefore,they are different, due to nucleotide of our DNA contains four different nitrogenous bases.

To know more about the  DNA and RNA nucleotide follow the link:

brainly.com/question/6460381
The order that the nucleotides are arranged in form different "codes" to create traits. RNA in humans is used for transporting, and making the amino acid proteins. The order of amino acid proteins also changes the polypeptide formed, and changes more traits, and characteristics. Basically, it's like reading a book. Each book is made up of the same 26 letters, but their all arranged in different orders. You can find the some of the same words in another book, but no two books are exactly alike. All the letters and words are arranged in different ways, even though other books have the same letters and words. 

An indirect measurement of the speed of molecules is _____. temperature friction energy

Answers

Answer: temperature

Temperature is a degree of hotness or coldness measured on a definite scale on an instrument called as thermometer. It actually measures the kinetic energy of randomly moving particles or molecules of air in an atmosphere, living system or entity under study in a constant speed.

An indirect measurement of the speed of molecules is temperature. It can be measured with a thermometer.

Sickle-cell anemia is a genetically inherited disease. Homozygous individuals (SS) have normal blood cells that are easily infected with the malarial parasite. Thus, many of these individuals become ill and may die. Individuals homozygous for the sickle-cell trait (ss) have sickled red blood cells that readily collapse when deoxygenated. Although malaria cannot grow in these red blood cells, individuals often die because of the hemoglobin disorder. However, individuals with the heterozygous condition (Ss) have some sickling of red blood cells, but generally not enough to cause death. In addition, the heterozygotes tend to survive better than either of the homozygous conditions as they are resistant to malaria. If 16% of an African population is born with a severe form of sickle-cell anemia (ss), what percentage of the population will be heterozygous (Ss) for sickle-cell and therefore resistant to malaria?

Answers

Answer:

Explanation:

it depends on the total percentage of the population. that way we can pick out the percentage of the heterozygous

Final answer:

The percentage of the population that will be heterozygous (Ss) for sickle-cell and therefore resistant to malaria is 84%.

Explanation:

To calculate the percentage of the population that will be heterozygous (Ss) for sickle-cell and therefore resistant to malaria, we need to find the frequency of the ss genotype first. Given that 16% of the population is born with a severe form of sickle-cell anemia (ss), the frequency of the ss genotype is 0.16.

Since we are dealing with a single gene with two alleles, the sum of the frequencies of all possible genotypes should equal 1. So, to find the frequency of the Ss genotype, we can subtract the frequency of the ss genotype from 1.

Frequency of Ss = 1 - Frequency of ss = 1 - 0.16  = 0.84.

Finally, to get the percentage, we can multiply the frequency by 100.

Percentage of the population that will be heterozygous (Ss) = Frequency of Ss x 100 = 0.84 x 100 = 84%.

Learn more about sickle-cell anemia here:

brainly.com/question/876359

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The setting of a Gothic work is characterized byA. growth of something good
B. growth of something evil
C. decline of something that was once evil
D. decline of something that was once good

Answers

The answer is letter D. decline of something that was once good. The Gothic work is very important because it symbolyzes the failure to sustain something that was once beautiful and thriving. The physical setting is important in creating emotional mood of fear which is characterized by : darkness, decaying scenery, labyrinths, and extreme lanscapes.

Answer: D

Explanation:

What is the purpose of DNA structure made of nucleotides

Answers

Answer:

DNA is made up of molecules called nucleotides.

Its unique structure enables the molecule to copy itself during cell division. When a cell prepares to divide, the DNA splits down the middle and becomes two single strands. These single strands serve as templates for building two new DNA molecules - each a replica of the original DNA molecule.
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