A.) An allele is a version of a gene that can be expressed as a phenotype.
Answer:
Brian most clearly exhibits symptoms of ADHD
Explanation:
ADHD stands for Attention Deficit Hyperactivity Disorder is a medical condition where the affected person develops different brain developmental process that leads to poor attention,restlessness,impatient or impulsive etc.
This type of symptoms are mainly found in children and it may lasts upto adulthood.
This type of behviour affect the child in school and at home.
To cure this disease,the affected person should consult the doctor,apply different therapy,medicines are also used to cure this disease.
Answer: The population will evolve, leaving only those genetically equipped to deal with low oxygen levels. brainliest
Explanation:
So every organism is individually classified without the worry of mixing up two organisms like a fly and nat.
Producers are where the cellular respiration occur in the biosphere.
