The gap between the axon terminal of one neuron and the dendrite of another neuron is called the:
A. Myelin sheath
B. Synaptic cleft
C. Axolemma
D. Node of Ranvier
Answer: Option B
Solution (By JKSSB Mock Tests)
A synapse is the junction where a nerve impulse is transmitted from one neuron to another. The synaptic cleft is the microscopic, fluid-filled gap between the presynaptic neuron (axon terminal) and the postsynaptic neuron (dendrite or cell body). Neurotransmitters are released into this cleft to carry the signal across to the next cell.
Explanation:
The urinary bladder is a muscular sac that temporarily stores urine received from the kidneys via the ureters, until micturition. The urethra drains urine to the exterior.
Explanation:
Double fertilization involves one male gamete fusing with the egg cell to form a diploid zygote, and the second male gamete fusing with the two polar nuclei (central cell) to form a triploid primary endosperm nucleus. The endosperm provides nutrition to the developing embryo. This unique feature ensures efficient nutrient supply and is typical of angiosperms.
Explanation:
Fossils are the preserved remains or impressions of past organisms, showing transitional forms and evolutionary change over geological time.
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