Which are substances that are moved into cells by facilitated diffusion?

viruses and bacteria

ions such as K+

fat-soluble molecules

oxygen and carbon dioxide

Which of the following are made of smooth muscles 1: Blood vessels, biceps 2: biceps, lungs, heart 3: heart, lungs, digestive 4: digestive, lungs, heart

Students investigated samples of amylase from 100 goats. 100 small filter paper discs were each soaked in a different sample of goat amylase. The students tested the activity of these amylase samples using plain paper. Plain paper contains starch.

What is most important about Earth's atmosphere? A. It always makes airplane rides smooth. B. It makes beautiful sunsets. C. Without it, there would be no air to breathe. D.

All of the following adaptations are evolutionary

Fossils are commonly found in which type of rock? A. paleolithic B. sedimentary C. igneous D. metamorphic

This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true? This pedigree chart shows three generations.

In what order do the major ecosystems of russia lie in bands that stretch the nation from north to south?

This type of selection means selective breeding of plants and animals

Which of the following involves spores of the same size?

How does lung volume control inspiration? Select one: a. A decrease in lung volume stops the intake of air from the nose and mouth. b. An increase in lung volume starts the intake of air from the nose and mouth. c.