Molluscs. hope this helps!
Answer;
- 100
Researchers have identified about 100 substances that are made in our body and brain that act as neurotransmitters.
Explanation;
-Neurotransmitters are the chemicals which allow the transmission of signals from one neuron to the next across synapses. They are also found at the axon endings of motor neurons, where they stimulate the muscle fibers.
-Neurotransmitters enable neurotransmission, which is the process by which signaling molecules (neurotransmitters) are released by the axon terminal of a neuron (the presynaptic neuron), and bind to and activate the receptors on the dendrites of another neuron.
Answer:
D
Explanation:
Diffusion and osmosis are both passive forms of transport because there is no energy need to transport something such as water from an area of high pressure, to an area of low pressure.
The answer is false. It can happen any time if the year
Answer:
C) Initially mutation will be the only source of variation in the population
Explanation:
In this experiment, mutation will be the only source of variation in the population.
Therefore, natural selection cannot begin operating immediately on the population because there was no initial variation.
Also initial differences in the population will not be as a result of sexual selection.
Finally, mutation is a random process. Despite the two populations being identical they will accumulate different mutations. Therefore after 100 generations the two populations will not be genetically identical.
