Black-crowned night-heron. This predator is adapted to hunt at night. In
the French Guiana this is one of the major night heron species with its
cousin the Yellow-crowned night-heron (Nycticorax violacea). Feeds
mainly on aquatic animals, including fish, amphibians and insects.
Coastal swamps.
The carbon atom can go to the plants on the Land.
<span>The bottleneck effect is the cause of the sudden shift in the genetic information of the population. Due to the landslide, suddenly high number of the members of the main population died, and this caused genetic drift for reducing the variation in the existing generation, which is now widely different from the original one.</span><span />
Answer:
DNA double strands are run in opposite direction
Explanation:
The DNA is a macromolecule and is made of the polynucleotide. In a DNA, Polynucleotides are arranged in two strands or helices. The two strands are joined together by hydrogen bonds. Each stand has two ends. One end is called 5’ (5 prime) and the end is known as 3' (3 prime). The two stands in a DNA run in antiparallel or in an opposite direction. It means at one end, one strand is 3' and the other is 5' and at the other end one strand is 5' and another strand is 3'.
Ch.5: Synaptic Activity
<span>Introduction<span>Otto Loewi studied the heart of the frog, which-like our own hearts- is supplied by two different peripheral nerves. One, the sympathetic nerve, excites the heart and makes it beat more rapidly; the other , the vagus, shows the heart. The problem was to discover the mechanism by which the effects of nerve impulses in either of these nerves are communicated to the heart muscle. Many believed that the electrical nerve impulse spread from the nerve to the muscle as an electrical wave; Loewi thought otherwise.Loewi tested two isolated frog hearts, one with the sympathetic and vagus nerves intact, the other with the nerves removed. A small tube containing salt water was placed in the heart with the nerves attached. When he stimulated the vagus nerve, the heartbeat slowed, as expected. Then he took salt solution that had been in the stimulated heart and placed it inside the heart without nerves. It too immediately slowed- exactly as if its own (missing) vagus nerve had been stimulated.He repeated the same procedure, stimulating the sympathetic nerve instead. The effect was again as if the nerve of the denervated heart itself were stimulated: the denervated heart began beating faster. These results could not be explained electrically; the nerves must have secreted chemicals into the salt solution that directly affect the muscles of the denervated heart.In one simple experiment, Loewi had demonstrated three important findings: (1) that communication at the gap between nerve and heart muscle was chemical, (2) that each nerve released a different transmitter substance, and (3) that it was the characteristics of the different transmitter substances that caused the increase or decrease in heart rate. This was the first direct experimental evidence of the action of chemical neurotransmitters.<span>Like the junction between nerve and heart muscle that Loewi studied, nerve cells communicate with each other at special junctions called synapses. </span></span></span><span><span> thanks and i hope this helps you.....
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