I'd say stone tools. Stone can be chiseled or left alone and be used as a weapon to defend one's self, or as a way of getting food.
Answer:
The true statements are:
An action potential never occurs in dendrites.
Norepinephrine is a monoamine.
Explanation:
In the following question only two statements are true that are; an action potential never occurs in dendrites as it occurs in nerves to send signals from cell body and axon and transmit it.
The second correct statement is Norepinephrine is a monoamine as these are particular neurotransmitters dopamine, serotonin, also known as catecholamines sometimes.
Thus, the correct answer is :
An action potential never occurs in dendrites.
Norepinephrine is a monoamine.
Sickle-cell disease is common in tropical and sub-tropical regions because being a carrier, carrying a single sickle-cell mutation (sickle cell trait), affords some resistance to malaria.
Answer:
I would say the answer is D.
Explanation:
It makes the most sense.
A chloroplast are used for the process of photosynthesis which makes food
