Answer:
1. Thymine, Guanine
2. 36% Adenine
Explanation:
1. Edwin Chargaff, who proposed the complementary base pairing rule, stated in his rule that the amount of purine bases (Adenine and Guanine) is equal to the amount of Pyrimidine bases (Cytosine and Thymine). This means that, in a DNA molecule, the amount of adenine is always equal to Thymine (A=T) and the amount of Cytosine is equal to Guanine (G=C).
Also, the total amount of the four nucleotide bases that make up a DNA molecule is equal to 1 or 100% i.e. A+T+G+C= 100%
2. Based on the rule above, if a sample of jelly fish DNA contains 14% Cytosine, the amount of its complementary pair (Guanine) will also be 14%.
Hence, Cytosine and Guanine will collectively occupy 14+14=28% of the DNA.
To find the amount of the other two bases i.e. Adenine and Thymine, we subtract 28% from 100%
That is, 100 - 28 = 72%
If both Adenine and Thymine contains 72% and each must be equal, we divide 72% by 2 to get the amount of each.
Hence, 72/2 = 36% of Adenine and 36% of Thymine.
According to the question, Adenine will contain 36% in the Jellyfish DNA.
Answer:
La biogeografía es el estudio de la distribución de especies y ecosistemas en el espacio geográfico y a través del tiempo geológico.
Answer:
D
Explanation:
The immune system can protect you from bacteria and viruses, so I believe the answer would be D.
The correct answer is C. It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.
Explanation:
Information is considered as reliable if it is supported by evidence and the author is an expert in the field. According to this, the information about the Labrador Retriever in the encyclopedia is reliable because it is based on multiple scientific studies and articles that likely used evidence such as tests, observations, among others. Besides this, the studies were done by scientists at veterinary schools, which are considered to be experts and authorities in the field of dog breeds. Thus, this source "is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools."
Answer:
B
Explanation:
The plains have large rivers flowing through them. Every living creature or plant that grows requires water, so the answer is B.
Fertilizers are needed by very large farms. It is what makes it possible to grow enough grain to have excesses to sell.
Pesticides are also needed. Insects abound in many sparsely populated areas.
Renewable resources are used, but it is not the answer.