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.
Answer: water
Explanation: Water is everywhere and required to survive, so water would be the most abundant compound.
The answer is A.
Temperature changes when salt is in water, therefore the water will become more livable and suitable to those fish .
Have a nice day.
~Brooke❤️
A ribosome<span> is a cell organelle. ... </span>Ribosomes<span> are found 'free' in the </span>cytoplasm<span> or bound to the endoplasmic reticulum (ER) to form rough ER. In a mammalian cell there can be as many as 10 million </span>ribosomes<span>. Several </span>ribosomes<span> can be attached to the same mRNA strand, this structure is called a polysome.
</span>Ribosomal<span> protein synthesis in eukaryotes is a major metabolic activity. It </span>occurs<span>, like most protein synthesis, in the </span>cytoplasm<span> just outside the nucleus. Individual </span>ribosomal <span>proteins are synthesized and imported into the nucleus through nuclear pores.</span>
Answer:
This is correct. The remaining portion:
Sympatric species that form interrelationships undergo coevolution.
Allopatric species in different environments can undergo convergent evolution.
Allopatric species in small populations and under intense environmental conditions can undergo genetic drift.
Explanation:
On the basis of geographical distance, speciation is of two major types:
- Sympatric
- Allopatric
Sympatric Speciation:
Sympatric speciation is the formation of new species with no gergraphical separation from the ancestor. The new and parent species both exist in the same environment but do not interbreed due to mechanisms of reproductive isolation. These involves both prezygotic and post zygotic barriers to reproduction such as timing of mating, sensitivity to pheromones, choice of mating sites or infertility and mismatched gametes. Species formed through sympatric speciation can form interrelationships and undergo coevolution i.e. the evolution of ones species is dependent on the other.
Allopatric Speciation:
It involves the geographical separation of the parent and new species. These species could be geographically separated by a river, mountain range or land mass.
Although, allopatric species evolve independently, they may develop similar characteristics that serve different functions. Allopatric species in radically different environments undergo convergent evolution i.e. species evolve similar characteristics without any ancestral homology.
Allopatric species that reside in small populations and are under harsh environmental pressures undergo a rapid genetic revolution i.e. genetic drift. This includes the Founder's and bottleneck effect that involve the continuation of a species from very few individuals after a drastic, sudden environmental change.