Which of the following is required for a trait to become more common over time in a population? A -There must be many varieties of the trait in the population. B-The trait must allow members of the population to eat only some kinds of food. C-The traits must give individuals an advantage in producing offspring that survive. D-The trait must be the result of an immediate change in the environment.

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Regarding most of the narrator’s story, which word best describes the tone?

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative