A cat is walking down a sidewalk and spots a dog in a nearby yard. The cat starts to run in the opposite direction and then quickly climbs a tree. Which of the following changes most accurately describes the movement of the cat? A. change in speed
B. change in distance
C. change in velocity
D. change in motion
(i think i know it, i just wanna be sure i have the right answer)

Eristics do scientists use to distinguish between organisms in different kingdoms

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems