Cathy conducts a scientific investigation. How can she make sure her results are valid?

What are the 5 steps of scientific method

A cell has a membrane potential of - 100 mV (more negative inside than outside) and has 1,000 times more calcium ions outside the cell than inside. Which best describes a mechanism by which Ca²⁺ enters this cell? a.

Which statements best describes the exosphere?

When a person is not feeling well a doctor may examine samples of the person's blood to see how many white blood cells are present why would this information be useful?

He birds shown above have beaks with three different shapes and sizes. these genetic variations in the black each appeared initially due to? - environmental factors - mutations - natural disaster - conscious choice by the birds

A 37-year-old client of Native American/First Nations/Aboriginal descent visits the clinic for the first time. She is about 12 weeks pregnant, and this is her first pregnancy.

When changing lanes, you should: A. Adjust your speed to match traffic in the new lane B. Move over several lanes at once C. Wait until you're at an intersection to perform the maneuver

Which structure does this organism use for movement? a. cilia b. contractile vacuole c. flagella d. pseudopodia?

How does cell division differ in plant cells and animal cells?

Air pollution can be controlled by A.) permitting more storm runoff B.). Burning more coal C.). Eliminating sewage D.) putting scrubbers on power plants