There are many types of natural selection like direct selection, disruptive selection and stabilizing selection.
The situation given is that a population of mice lives in a city. The largest mice tend to be killed by predators and the smallest mice cannot compete for food.
The type of selection here is stabilizing selection. It is a type of natural selection in which there is decrease in genetic diversity as the population stabilizes.
I don’t understand the question but if I can make a correct inference, they have thorns to protect themselves from predators.
Answer:
Nutrición humana: una descripción general | Temas de ScienceDirect www.sciencedirect.com ›temas› nutrición humana
La ciencia nutricional continúa descubriendo mecanismos cada vez más complejos de cómo ... Así, la leche materna se considera un alimento completo específico de la especie (Lönnerdal, ... Si este fuera un fenómeno generalizado, podría explicar algo de la corriente.
Explanation:
Glycolysis, Krebs cycle, electron transport chain
It's called appendages if that is what you need