a better statement would be that "every experiment ever done has confirmed the hypothesis that energy is conserved"
Answer:
Explanation:
The layer most likely to have organisms which lived at the same time as the bird species is Layer 2. Layer 2 is closer to layer 3 than any of the other layers listed. Assuming that layers were laid down sequentially as time passed, it is reasonable to assume that layer 2 was laid down most closely in time to layer 3.
Taxonomy, or taxonomy, is originally derived from the need for scientific classification of species. It now extends to other sciences, including human sciences, information sciences and computer science. Sometimes we call it "taxonomy" to describe the result of a taxonomic activity, that is to say a classification.
The traditional classification is based on a fixed hierarchy of categories (taxon ranks), defined as follows:
Reign (or Kingdom) (there are currently six) → Division (or phylum) → class → order → family → gender → species.
In DNA Nucletide monomer are linked to the next through covalent bonds
Hope this helps!
Answer:
The DNA mutation causes a change in the amino acid sequence for hemoglobin, which causes a change in the shape of red blood cells.
Explanation:
Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body.
Normally, the flexible, round red blood cells move easily through blood vessels. In sickle cell anemia, the red blood are shaped like sickles or crescent moons. These rigid, sticky cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body.
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin). In sickle cell anemia, the abnormal hemoglobin causes red blood cells to become rigid, sticky and misshapen.
The sickle cell mutation reflects a single change in the amino acid building blocks of the oxygen-transport protein, hemoglobin. This protein, which is the component that gives red cells their color, has two subunits. The alpha subunit is normal in people with sickle cell disease. The beta subunit has the amino acid valine at position 6 instead of the glutamic acid that is normally present. The alteration is the basis of all the problems that occur in people with sickle cell disease.
