A rock formed from cooled and hardened magma or lava

One advantage a plant gets from having flowers is that a. flowers are smaller than spores and easier to make. b. there is no sexual reproduction in plants with flowers. c.

What do the moon and sun have in common

Which type of organism is most likely to undergo sympatric speciation by polyploidy?

Geologic events that occurred during the Paleozoic Era include mountain building and volcanic activity. true or false

The vena cava pumps blood from the heart to the rest of the body a. True b. False

What experimental evidence leads scientists to believe that only quantized electronic energy states exist in atoms?

With which atoms does carbon most frequently bond

What is a karyotype?

A scientist has been working for 15 years to develop a new type of plastic material, but she has not yet been successful. Which of the following best explains why her work is still a success?

Technology can have good and bad effects. What is a bad effect of spraying pesticides on crops