On darwin's voyage, he observed ostriches and rheas living on grasslands on separate continents. these two types of birds are similar, but not identical. how did darwin apply these observation

a. he tested the birds to see if each would survive in the other's environment.
b. he developed hypotheses to explain the distribution and differences of the birds.
c. he concluded that one of the birds must have evolved from the other bird.
d. he developed hypotheses to explain how each bird produced more of its own kind.

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

 

  deforestation caused by logging.

Hypoglycemia corresponds to a blood glucose lower than 0.60 g / l. his symptoms are: *a sudden energy drop.*nervousness, irritability, and tremors.*a pallor of the face.*sweats.*a headache.*nausea*palpitations.*an imperious hunger.*a state of weakness.*dizziness, drowsiness.*an inability to concentrate and an incoherent speech.*vagal discomfort signs of drug poisoning are variable depending on the substance taken. but for hypoglycemia, they affect the peripheral nervous system, then spread to the central nervous system if the blood glucose is very low, and this becomes a medical emergency.