How do scientists use DNA to study the origins of humans? a. Cloning b. Examining the number of chromosomes in populations c. Looking at the genetic markers in different populations

Cyanide is an especially powerful natural poison derived from a chemical found in wild almonds. Even small does have been shown to be extremely lethal to animal cells, and a hand full of wild almonds contains enough cyanide to kill an adult human.

What are two ways you can use less energy in your home? What are two ways that energy can be conserved? Why is it especially important to not waste energy from fossil fuels? Why are trains much more efficient than trucks for transporting items?

Which action would best demonstrate that a scientist is being creative? using prior knowledge to solve problems O requiring evidence and thinking logically O taking a closer look at the natural world O following strict rules when using human test

A bald man marries someone who is not bald but whose father was bald. What is the % chance of a child who will eventually be bald?

Name the main parts and functions of the endocrine system.

Which of the following best describes REM sleep?

A "red-hot" bacterial infection of the intestinal tract irritates the intestinal cells and interferes with digestion. such a condition is often accompanied by diarrhea, which causes loss of body water.

Which of Mendel's laws BEST explains why genetic variations occur in offspring resulting from sexual reproduction? A law of segregation B law of dominance C law of independent assortment D law of crossing-over

When can a primary succession occur?

Friction between a skateboard wheel and the surface produces?