<span>Out of the following given choices;</span>
a. the major excitatory
neurotransmitters in the CNS.
b. known to be solely inhibitory in the brain.
c. the predominant neuromodulators in the spinal cord.
d. the most common neurotransmitters in the CN
The answer is D. This
is because the amino acids are the main synaptic
neurotransmitters in the brain neurons. Glutamate is released by all
brain neurons and has an excitatory effect. GABA and glycine have the opposite effect
(inhibitory)
Among the most frequently used species identification methods are: The evolutionary relationships between the unknown sequence and a set of known standard sequences are estimated using phylogenetic trees.
<h3>What is a phylogenetic tree?</h3>
Among the most commonly used species identification methods are: The evolutionary relationships between the unknown sequence and a set of known reference sequences are estimated using phylogenetic trees.
A phylogenetic tree is a diagram that depicts the evolutionary relationships between organisms or groups of organisms.
Scientists consider phylogenetic trees to be evolutionary hypotheses because the proposed relationships cannot be confirmed in the past.
Thus, every individual of same species are related to each other, so scientists can analyze another specimen from the same species.
For more details regarding phylogenetic tree, visit:
brainly.com/question/13577065
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Answer:
Chemical reactions convert reactants into products. In nonliving systems, the presence of a(n) catalyst allows the reaction to proceed very quickly and have a lower activation energy. In living systems, this functions is carried out by proteins called enzymes.
Meiosis and Mitosis are both ways of how cells multiply and reproduce
Meiosis being gametes (sex cells) and Mitosis is everything else
The actual answer is, "A", an ocean trench.
You can find out more about them by researching them up on Google, it's only a few phrases and a hit on the enter key :P