The picture shows a section of a wastewater treatment plant. This section of the plant removes oil and fats in water. What would be the purpose of blowing air into the wastewater?

Which of these parts of the membrane large moecules pass through it ?

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.