What does Na + represent? Select all that apply. a positively charged sodium ion a sodium ion that has lost an electron a negatively charge sodium ion a sodium ion that has gained an electron a neutral sodium atom

What is the significance of mendel's experiments to the study of genetics?

5. In this lab, you continued to add Reagent D to each solution until it turned blue. The purpose was to remove the oxygen to measure how much was left. The more drops you had to add to acquire the blue color, the more oxygen was present in the tube.

Which four body systems interact to allow a person to sneeze? A) Muscular, immune, nervous, respiratory B) Nervous, respiratory, circulatory, skeletal C) Respiratory, endocrine, skeletal, circulatory D) Lymphatic, skeletal, respiratory, muscular

Which of the following vertebrates are ectothermic? a. hummingbirds b. newts c. kangaroos d. horses

What happens when humans burn fossil fuels? Carbon is released into the atmosphere. Carbon is removed from the atmosphere. Temperatures on Earth decrease. Carbon is destroyed.

How do predator & prey populations interact with each other? (In terms of population size.)

What is the source of the infection Cyclospora? How did the biological characteristics of the pathogen influence you conclusion?

Why do cells in meiosis need to be different from those produced during mitosis?

What type or types of rock can melt into lava or magma? A. igneous only B. metamorphic only C. igneous and sedimentary D. igneous, sedimentary, and metamorphic

In which ways does the body respond when its temperature is too high?