1. Directions: Write TRUE if the statement is correct and FALSE if not. Write your answer on the space provided before each item. 1. Food preservation helps us extend the shelf life of our food.

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TLE

Which scientist established the law of octaves?

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.

(05.04 mc) the table below shows the set of traits in four different beetle populations. traits in population population traits 1 brown-colored beetles, pesticide-resistant gene present 2 green-colored beetles, pesticide-resistant gene absent 3 green and brown–colored beetles, pesticide-resistant gene absent 4 green and brown−colored beetles, pesticide-resistant gene present which population of beetles is most likely to become extinct when the existing conditions change? (4 points) select one: a. 1 b. 2 c. 3 d. 4