What units are used to describe frequency or vibrations per second? decibels
hertz
meters
pitch

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Wich organism obtains its energy from dead or decaying matter

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