<span>Concentration of cones (photoreceptors)…..optical
nerves. The fovea is responsible for the higher visual acuity 20/20 vision. It
is the region if the retina that is depressed and has little blood vessel
supply to avoid dispersion of light. While it only comprises 1% of the
retina, it makes up 50% of brain’s visual cortex. </span>
With a higher population there are more people to have chances at getting sick. Now once someone gets sick most people are bunched up in cities meaning there in contact with a lot of others making the disease spread quickly.
From - brainly.com/question/11776474#readmore
Answer:
Second law of thermodynamics
Explanation:
The second law of thermodynamics states that whenever energy is transformed, there is a loss energy through the release of heat. This occurs when energy is transferred between trophic levels as illustrated in a food web. When one animal feeds off another, there is a loss of heat (energy) in the process.
Answer: The type of inheritance shown by the gene that control sickle cell anaemia is autosomal recessive inheritance
Explanation: Autosomal recessive inheritance means that there is mutation in two copies of the gene in a cell. Sickle cell anaemia is a condition caused by a single point mutation in the two beta chains of haemoglobin. Haemoglobin is a protein in the red blood cells responsible for oxygen transport to the cells. The mutation is caused by substitution of valine in place of glutamate at the sixth position of the two beta chains of haemoglobin.
Every individual has two copies of almost every gene, one from the mother, and one from the father. The autosomal recessive inheritance pattern of sickle cell gene means that for an individual to manifest outwardly as sickle cell, the two copies of the gene inherited from the parents are mutated.
