Answer: Humans have 22 pairs of autosomal chromosomes with the same gene in both members of a given pair) and one pair of sex chromosomes, which are designated XX in females and XY in males.
Explanation:
Bipedalism is a form of terrestrial locomotion where an organism moves by means of its two rear limbs or legs.
(ostrich, human etc. )
In the two maps that show the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa, it can be seen that in the regions with no malarial outbreak or malaria-free areas coincide with the grey to lighter shades of red in the heat map of the allele frequency of HbS. The color coding in the heat map for the allele frequency tells us that the frequencies range from 0 to 2.02 in the malaria-free areas.
Hence the answer is A)When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
Answer: He supported polygeny through his work measuring human skull volumes. He measured modern and ancient skulls and concluded that the human race (or species) could be ranked on a scale of intelligence. He concluded that the ancient Egyptians were not African, but were Caucasian.
G-linked proteins are activated by odorants, as well as by sweet, bitter, and umami chemicals, though the specific action in the cell varies. Direct signaling pathways are triggered by sour and salt chemicals.
Gustatory receptors are found on the tongue's papillae and are utilized to sense flavor. The olfactory epithelium of the nasal cavity contains olfactory receptors. These are used to identify different odors. These receptors use sensory nerves to transmit sensory messages to the brain.
Gustatory receptors belong to the cells on the tongue that are specifically designed to perceive taste, whereas olfactory receptors refer to any of the nucleated, specialized cells of the mucous membrane of the nostrils that serve as the receptors for smell. So, the primary distinction between gustatory and olfactory receptors is this.
So, we can say that odorants, as well as sweet, bitter, and umami compounds, induce G-linked protein activities; however, the cellular response is different for each. Acidic and salty substances activate direct signaling pathways.
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