Answer: B. describe what is causing a change in the environment
Explanation:
Environmental indicators can be define as the signs shown by the biotic as well as the abiotic factors of the environment which are indicative of the changes occurring in the environment. These indicators will help in tracking the exact state of the environment. For example, the cause of ozone depletion is the increase in concentration of chlorofluorocarbons and other pollutants in the atmosphere. These are the warning signs that occur due to the hazards caused by humans and catastrophic events.
Answer:
B. Carbon dioxide moves from the blood to the air in the alveoli.
C. The capillaries that surround the alveoli exchange both carbon dioxide and oxygen.
E. Oxygen is absorbed by the blood in the capillaries that surround the alveoli.
Explanation:
Alveoli are the small sacs that are present in the lungs. Main function of alveoli is to exchange gases i. e. oxygen and carbondioxide with the blood that is present in the capillaries of the lungs. Blood that comes from the cell has high concentration of carbondioxide so it is taken by the alveoli and the oxygen present in the alveoli is absorbed by the cell. About 480 millions of alveoli are present in human lungs.
The lac Operon
In E. coli, a cluster of three genes called the lac operon produce enzymes that break apart lactose.
Organelles. Some types of organelles include: Ribosomes, Lysosomes, Golgi Apparatus (AKA Golgi Bodies or Golgi Complex), Endoplasmic Reticulum, Vacuoles, Mitochondria, and Chloroplasts.
Because evolution itself is a very slow process. Having said that, the chance of having a continuum of various animals would mean that evolution would have progressed very fast. Because evolution is slow, different species establish themselves for different ecological niches and environments, this enables them to become better through time at a certain environment which then leads to eventual diversification in the number of species.
