Answer:
<u>acetylcholine</u>
Explanation:
In the pre-synaptic knob there are vesicles which contain a transmitter substance called acetylcholine. When an impulse reaches the synaptic knob, it stimulates the vesicles to move towards the pre-synaptic membrane releasing the acetylcholine.
The transmitter substance makes the membrane permeable. The neuromuscular junction contains the sensory neurone(afferent), motor neurones(efferent) and the relay neurones(connector).
Answer:
Producers which means plants have the most energy in a food chain or web besides the sun and they give an organism more energy than a primary consumer or secondary consumer would. Plants absorb about 1% of the sunlight that strikes them. The rest is reflected into space or transmitted through objects.
Answer:
Control methods
Biological pest control. Main article: Biological pest control. ...
Cultural control. Cultivation by ploughing exposes insect pests to predators such as black-headed gulls. ...
Trap cropping. Main article: Trap crop. ...
Pesticides. Main article: Pesticide. ...
Hunting. ...
Physical pest control. ...
Poisoned bait. ...
Fumigation.
Strains of bacteria can become immune to antibiotics that once killed them effectively <span>is the best example of evolution occurring.</span>
Answer:
They occur when the Sun reaches its highest or lowest point in the sky.