they form *vesicles* which may be early forms of *Modern-day cells*.
hope this helps!!!!! mark brainliest please!!!! :P
Answer:
thymine
Explanation:
Adenine always bonds with Thymine in DNA and Cytosine always bonds with Guanine
Answer: the last ones wrong because to have lots of biodiversity you need different types of plants or organisms
A tundra has little to no trees
The habitat one is correct
Explanation:
Answer:
In the mentioned scenario, norepinephrine and acetylcholine are the neurotransmitters, which would have been present at the higher concentrations in Sean's brain. Norepinephrine signifies to a neurotransmitter that plays an important part in dreaming, emotions, sleeping, attentiveness, and learning.
It also gets released in the bloodstream as a hormone, where it augments the rate of heart and causes the blood vessels to contract. Another neurotransmitter called acetylcholine signifies the chemical that is released by the motor neurons to instigate the muscles.
