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To what does “descent with modification” refer?

a.) All species come from preexisting species but stay basically the same.
b.) All species come from preexisting species and are changed over time.
c.) Some species come from preexisting species and are changed over time.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Why does the skin of your finger shrink when you wash clothes for a long time?

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.