The junction between two neurons where neurotransmitters are released is the:
A. Dendrite
B. Axon hillock
C. Synapse
D. Node of Ranvier
Answer: Option C
Solution (By JKSSB Mock Tests)
A synapse is a specialized junction where the axon terminal of one neuron communicates with the dendrite or cell body of another neuron via neurotransmitters. The axon hillock is where action potential initiates, nodes of Ranvier are gaps in myelin sheath, dendrites receive signals.
Explanation:
Norman Myers introduced the concept of biodiversity hotspots in 1988—regions with high endemic species and significant habitat loss (≥70% original vegetation lost). Examples: Western Ghats, Indo-Burma. Conservation efforts prioritize these areas. Darwin contributed evolution, Humboldt to biogeography, E.O. Wilson is known for sociobiology and biodiversity studies. Hotspots cover only 2.4% of Earth's land but hold >50% of plant species.
Explanation:
Fertilization is the union of a haploid sperm and a haploid ovum to form a diploid zygote. Pollination is pollen transfer in plants, implantation is embryo embedding in uterine wall, cleavage early mitotic divisions.
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