Answer:
ONLY IN CONNECTED NERVE CELLS
Explanation:
THE spot of close connection between axon and dendrite is the synapse. A single axon can have multiple branches, allowing it to make synapses on various postsynaptic cells.In the central nervous system, a synapse is a small gap at the end of a neuron that allows a signal to pass from one neuron to the next. Synapses are found where nerve cells connect with other nerve cells. Synapses are key to the brain's function, especially when it comes to memory.
Answer:
A) They share short homologies at their respective tips
Explanation:
The cells of human contain two types of chromosomes that is autosomal and sex chromosomes.
The 22 pairs of autosomal chromosomes in humans are formed by the pairing of these chromosomes during the meiotic phase via the formation of a structure called synaptonemal complex between homologous sequences.
However, the two types of sex chromosomes called X and Y are not similar in their length but they pair via the formation of synapse which involves very short homologous sequences called "pseudoautosomal regions". The formation of the synapse through this region is called the X-Y body.
Thus, Option-A is the correct answer.
This type of speciation is called Peripatric Speciation. Peripatric speciation gives rise to daughter species that becomes reproductively isolated. Parent and daughter species are usually adjacent to each other but did not overlap. There are two requirements for this kind of speciation, geographic space and time.
