Which of the following is true about natural selection?

A.) It occurs extremely rapidly

B.) It can always be observed within a single generation

C.) It causes mutations to occur

D.) It causes more useful traits to be passed to offspring

How does charging by conduction occur?

a person sits on a stool in science class. They weigh 145 pounds. What force does the stool excerpt on the person to prevent them from crushing the stool?

What is the advantage of combining carbon from coal with steel?

If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is A. mg/2 B. mg C. 2mg D. 4mg

A rock dropped on the moon will increase it's speed from 0 m/s to 8.15 m/s in about 5 seconds what is the acceleration of the rock

What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several

In which galaxy is our solar system located? a. milky way b. ngc 4414 c. andromeda d. small magellanic cloud

Two astronauts, of masses 60 kg and 80 kg, are initially right next to each other and at rest in outer space. They suddenly push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12 m

A person suffering from anaemia gets tired

Jessica took a Mylar balloon outside on a very hot day. As she waited for the bus the balloon began to get bigger. What is the best explanation of this?