Answer:
Single loop
Double loop
Explanation:
Circulatory system in the body helps in the transport of oxygen, nutrients and other important substances in the body.
Single loop circulatory systems involves blood passing through the heart only once on each circuit around the whole of the blood circulation system of the animal.
Double loop means there are two loops in our body in which blood circulates. One is oxygenated which means oxygen rich and the other is deoxygenated, which means it has little to no oxygen, but a lot of carbon dioxide.
Answer:
Explanation:
La evidencia de un antepasado común en los seres vivos, que han encontrado durante décadas científicos que trabajan en numerosos campos, demuestra la descendencia común de estos seres, que la vida en la Tierra se desarrolló a partir de un último antepasado universal, que la evolución existe y que puede demostrar los procesos naturales que han dado como resultado la biodiversidad de la vida en la Tierra. Esta evidencia apoya la síntesis evolutiva moderna, la actual teoría científica que explica cómo y por qué cambia la vida a lo largo del tiempo. Los biólogos evolucionistas han documentado evidencias de antepasados comunes realizando predicciones verificables, probando hipótesis y desarrollando teorías que ilustran y describen sus causas.
The amount of genetic variation in a population
Answer:
When you are hungry your brain signals your digestive system to prepare for food. This leads to stomach growling. Your brain does this because it knows that you are hungry, and consequently the brain signals the digestive muscles to contract. There is also, usually, some gas in the intestines and stomach. The noises come out when the mixture of the gas and fluid, digestive juices, squirt through a opening that separates the stomach and small intestine.
Sometimes the noises happen because of an excessive amount of gas in the small intestine.
