Over the course of Earth's history, many species have evolved. However, many species have also become extinct.

describe what occurs between water molecules in hydrogen bonding draw a diagram labeling the hydrogen bond

Technology progresses so new needs can be satisfied true or false since climate is hard to study on a global scale scientist use computer models to make climate predictions True or false

Does the appearance of the cavefish and the minnow suggest a common ancestry? Why?

Which limitation of fuel cells is the most likely reason why people are concerned about using fuel cells in cars? a. Hydrogen gas is volatile. b. Water contains a lot of hydrogen atoms. c. Fuel cell cars cannot drive at extreme speeds. d.

How do the immune system and the respiratory system worl together

Can biodegradable pollutants cause environmental problems

Scientists at the tar pits discovered that many of smaller animals they extracted from the pits still exist around los angeles today. But many larger mammals such as woolly mammoths and saber toothed tigers are now extinct.

The kidneys are organs that filter wastes out of the blood stream. Which of the following objects could best be used to make a simple model of a kidney? A. water pump B. plastic bag C. coffee filter D. block of wood

How might bacteria evolve to resist antibiotics

Which of the following is an example of omosis