Answer: A
Explanation:
Whaling is the practice or industry of hunting and killing whales for their oil, meat, or whalebone.
Explanation:
Surface area and pores play important roles in the cell.
Pores are the tiny holes on the surfaces of a body. They help to facilitate movement of materials in and out of the cell.
The surface area is the amount of space the surface of a cell occupies.
- Pores in a cell needs to be in proper shape in order to facilitate movement of materials.
- When the pores in a cell are too large, too much materials are bound to leave the cell. Tiny pores makes it difficult for the cells to have enough materials to function properly well.
- The surface area of a cell allows for the diffusion of materials in and out of cell.
- The larger the surface area of a cell, the more and better reactions takes place because they will receive important life sustaining resources.
Learn more:
Surface area to volume ratio brainly.com/question/9666705
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Answer:
The first plant demonstrate stunt growth. The second one demonstrate rapid growth
Explanation:
The first one lacks proper care and is not exposed to sunlight. The second one is the opposite of the first one
Answer:
1. The difference between the normal hemoglobin protein DNA sequence and the sickle cell hemoglobin DNA sequence is a base to base shift, in this case adenine (GAG) to thymine (GTG).
2. The difference affects the amino acid sequence of the protein by replacing glutamic acid (Glu) with valine (Val).
Explanation:
In sickle cell anemia, a change in the DNA nucleotide sequence is observed, where adenine is substituted by thymine, whose expression is the change in the amino acid sequence of globine β, incorporating valine instead of glutamic acid. This represents a molecular mutation - point mutation - by subtitution, which corresponds to missense mutation.
<u>Normal hemoglobin protein in a RBC</u>
DNA CTG ACT CCT GAG GAG AAG TCT
Amino acids Leu Thr Pro Glu Glu Lys Ser
<u>Sickle cell hemoglobin protein in a RBC</u>
DNA CTG ACT CCT <em>GTG</em> GAG AAG TCT
Amino acids Leu Thr Pro <em>Val</em> Glu Lys Ser
When GAG is transcribed to mRNA, the CUC codon is obtained, which codes for glutamic acid. Thymine substitution causes the DNA sequence to change to GTG, which is transcribed as CAC, the codon that encodes the amino acid valine. The <u>change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease</u>.
