Answer:
(a) Muscle B contracts and muscle A relaxes
(b) The Heart
Recycle and renew are the two R's that uses and transforms the waste material. Recyclables do not equate to renewable as recyclable materials do not occur naturally.
<h3>What are recyclable and renewable?</h3>
Recyclable is the resources that are used finite times over and over and undergo a certain process for re-use purposes. They can be naturally or by humans, processed to be used again.
Renewable is resources that are natural and are replenished in nature when gets decreased by natural processes.
Some recyclables like aluminum and glass are not renewable as they are not formed naturally and do not get replenished by natural processes.
Therefore, recyclables are not renewables.
Learn more about recycling and renewable here:
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Answer:
Option B
Explanation:
When ever a scientific research or experiment is conducted , it is made sure that the results obtained are consistent through multiple trials. Here , only two trials are done i.e one on coast of California and the other on the Pacific Ocean.
Since the number of samples taken for this study are not as per the standard sample guidelines and hence the result obtained can not be considered as a acceptable.
Thus, option B is correct
Answer:
In the gums
Explanation:
Lidocaine is a compound which can be used as a local anaesthetic. This anaesthesia works by blocking the voltage-gated channels which allows the influx of the sodium ions. As the sodium ions do not enter therefore an action potential is not generated in the axons as a result of which no pain is felt in the area.
In the given since the lidocaine is used by the dentist therefore the dentist in order to treat some dental problem must inject the lidocaine in the gums where the sensory receptors of the teeth are present.
Thus, in the gums is the correct answer.
