A) gravitropism is how they "know"
Hippocampus
It is a small part of the brain located on the medial temporal love and forms important part of the limbic system, these are the regions that regulates emotions. This is also associated with memory, spatial navigation, consolidation of information. Damage to this area can cause memory loss, difficulty establishing memory . In Alzheimer's disease hippocampus is one of the first regions in the brain to be affected.
The least related to organism A is Organism D.
<h3>What is amino acid?</h3>
Amino acid is an organic compound made up of amine, carboxylic group and an organic R group.
Amino acids are the primary building block of proteins.
There are 20 types of amino acids are present.
Amino acids are necessary for the growth of the body.
Thus, the correct option is organism D.
Learn more about amino acid
brainly.com/question/15823799
Darwin's finches are a gathering of around fifteen types of passerine winged animals. They are outstanding for their exceptional decent variety in nose frame and capacity. They are regularly named the subfamily Geospizinae or tribe Geospizini.
After an immense dry spell, the greater hooked finches lived and the littler ones passed on. So two years after the fact finches har mouths that were somewhat greater.