Hola , bueno una portada es la primera plana o la cara principal de algo , en tu portada debes colocar tu nombre el nombre del proyecto , que eres de sexto grado , el nombre de tu profesor , básicamente es la presentación de lo que vas a presentar , es como la introducción.
Answer:
The correct option is B) a pattern of biological functioning that occurs on a 24-hour cycle.
Explanation:
Biological rhythm is defined as the regular variation of an organic function related to the course of time, circadian biological phenomena (around the day), are those with a period of approximately 24 hours.
Circadian rhythms are physical, mental and behavioral changes that follow a daily cycle (the biological rhythm), and that respond primarily to light and darkness in an organism's environment. This cycle close to 24 hours, allows to recognize the sleep-wake phenomena and their homeostatic action, in the systemic processes of every living being. The circadian system is composed of photoreceptors, pacemakers and efferent pathways that allow a regular functioning of the sleep and wakeful state.
Answer:
A. Sexual reproduction
Explanation:
Sexual reproduction promotes variable gene combinations in a population leading to genetic variation. Examples of genetic variation include eye color, blood type, camouflage in animals, and leaf modification in plants.
Outer space is an empty space that’s made up of gases, electromagnetic radiation, magnetic fields, neutrons and dust
