The main characteristic of all vertebrates is the presence of

a. cartilage

b. a large brain

c. a backbone

d. an exoskeleton

I got it. The answer was B

A spaceship accelerates from 0 m/s to 60 m/s north in 3 seconds. What is the acceleration of the spaceship? a. 20 m/s2 b. 60 m/s2 c. 180 m/s2 d. 1 m/s2

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Daniel Levinson found that men and women A. Go through the same stages of development B. Differ in terms of their social roles and identities C. Deal with the development tasks in each stage differently D. All of the above

A small bug is lying resting when nine ants simultaneously ambush it and begin pulling it in different directions. They are each applying force to the meatloaf of a different magnitude and direction.

Humpty and Dumpty attempt a tug-of-war with a 16-meter-long rope standing on a smooth frictionless surface. Upon pulling the rope, how far will each one of them slide before they meet each other, if their mass is exactly the same?

Which tools would sara us to find an irregularly shaped objects mass and volume A. a meter stick, a ruler, and water B. a meter stick, a balance, and water C. a balance, water, and a ruler D. a balance, water, and a beaker

Scientists who study races and their origins are called A. anthropologists. B. ethnologists. C. paleontologists. D. sociologists.

Why are telescopes that detect non - optical radiation useful for studying objects in space

Which of the following is not an application of Doppler technology? police speed guns weather radar ultrasound imaging of the liver determining the motion of a star

For a constant voltage, increasing the resistance will cause the current to decrease. true or false