In 1665, Robert Hooke observed D. Cell Walls through a microscope!
Describe how phloem is affected if the leaves start to die off. (3 points) The phloem is effected by the deprivation of water from the disease of the tree, as a result the metabolism of the plant will shift down ward causing the phloem to decrease due to the dying of the leaves.
The answer is <span>A. Decrease in genetic variation
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A founder effect is a result of a geographical separation of a few individuals from the original population. Those few founding individuals will form a new population so they are founders. In this new population, there will be present alleles of the few founding individuals. However, those few founding individuals do not represent a whole genetic variation of the old population, but only some part of it.
Imagine a population of fish in which there are yellow, green, blue, and red colored fish. In the population, there is a genetic variation. But, if a few green-colored and red-colored fish geographically separate from the population and form a new population, in the new population there will be decreased genetic variation (because there are only green and red fish compared to the old population where are fish in 4 different colors).</span>
The synapse is the junction present between two neurons.
In a synapse, the electric impulses are transferred in the form of chemical molecule, which is also known as neurotransmitter. The synapse receives the signals from the sender neuron also known as presynaptic neuron to the receiver neuron, also called as postsynaptic neuron.
Hence, the correct answer is option c. junction between a sending neuron and a receiving neuron.
