Which situation shows where potential energy and kinetic energy are balanced? Group of answer choices

A stopped bicycle

A roller coaster car going uphill

A car moving at a steady speed

A runner slowing down
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What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

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