Neurotransmitters are released into the synaptic cleft, the gap between synaptic terminals and adjacent neurons, and then bind to special neurotransmitter receptors, molecules on the membrane of adjacent neurons.
Neurotransmitters are body’s chemical messengers produced by the nerve cells. Neurotransmitters are used by the nervous system to send messages to other cells, including other nerve cells and muscle cells. Neurotransmitters are classified according to their functions as; excitatory neurotransmitters, inhibitory neurotransmitters, and modulatory neurotransmitters. The major types of neurotransmitters include; trace amines such as N-methylphenethylamine, amino acids such as D-serine, and gasotransmitters such as carbon monoxide (CO).
Darwin lived in a time where natural selection was a strange theory among scientists and researchers. This was especially true when other researcher Lamarck argued that organisms passed on helpful traits to their offspring, that they magically could form a new trait to adapt to their environment and then pass it onto their offspring. For example, if a giraffe was too short to reach food, it would grow a larger neck in its lifetime and then pass that trait onto its offspring. Darwin argued that, through the process of survival of the fittest, that short giraffe would die off and never receive the chance to pass on its shortness to future populations. Thus, taller giraffes would survive— they can reach food, shorter giraffes can’t— and the short genes would disappear. The fact that Darwin was introducing a new theory that nobody was used to at the time was peculiar, so he had few people on his side until long after his observations.
Another problem Darwin had was the lack of technology. To travel, Darwin would have to use boats to reach far away places, and of course, this took time.
The final problem Darwin had was the extra time it took for evolution, a process that can take up to millions of years. Evolution didn’t occur over night— it took time for Darwin to conduct experiments, observe, conduct them again, come to a conclusion, and so on.
Hope this helped a little!
Answer:
an association between two organisms in which one benefits and the other derives neither benefits nor harm
Explanation:
A frog using a plant as protection
Answer:
D
Explanation:
A does not make sense neither does b c was a little tricky but it includes dolphins so d
Answer:
adding nucleotides one by one
Explanation:
A typical primer is about five to ten nucleotides long. The primer primes DNA synthesis, i.e., gets it started. Once the RNA primer is in place, DNA polymerase "extends" it, adding nucleotides one by one to make a new DNA strand that's complementary to the template strand.
