A. Organisms with less desirable traits do not reproduce
is the answer
El niño is the boy ,la niña is the girl, el niño y la niña son differentes porque un niño tiene differente tipos de vida que las niñas los niños no van a tener vos de mujer y takpoco los niñas vos de hombre.(english: the boy and the girl are different because they have different types if lifes like a girl wouldnt have a deep voice nor a boy would have a squeek voice)
Answer:
eukaryotic cells have a nucleus and membrane-bound organelles. prokaryotic cells have neither.
Explanation:
Answer:
The correct answer is B. A small substance generated in response to receptor binding that activate or inactivate specific proteins.
Explanation:
An example of second messengers are AMPcyclic, Ca2 + ion. In the case of cAMP, the enzyme adenylate cyclase is synthesized from ATP (this is found within the cell membrane). The AMPC is involved in cell signal transduction pathways before external and / or internal stimuli, (example: adrenaline hormone), being able to activate the enzyme called protein kinase A (PKA), which phosphorylates its target and thus the signal is transmitted.
