What two things must happen for diffusion to occur?

The weight of an object is 200 N. The object sinks in tub of water. The buoyant force is a) less than 200 N b) greater than 200 N c) equal to 200 N

Which statement describes an element?

When working with a microscope to focus on a specimen identify one safety issue to consider when switching to a higher power object

When iron reacts with oxygen, it forms iron oxide, or rust. 4 Fe + 3 O2 2 Fe2O3 If 112 g of iron (Fe) combines with 24 g of oxygen (O2), how much iron oxide is formed? A. 24 g Fe2O3 B. 136 g Fe2O3 C. 112 g Fe2O3 D. 88 g Fe2O3

Why is it important to alter only one variable at a time when designing and experiment?

What information can be inferred about genes that are located on different chromosomes? what information can be inferred about genes that are located on different chromosomes? these genes are always inherited together.

Bianca is very self-conscious about her weight. she indulges in strict dieting and often skips her meals. as a result, she was recently diagnosed with osteoporosis, an abnormal condition related to the thinning of bones.

All processes of moving materials across the plasma membrane are classified as either A) diffusion or osmosis B) passive or active transport C) phagocytosis or pinocytosis D) endocytosis or exocytosis

What three factors does a species diversity index take into account? a. Species richness, species diversity, and species productivity b. Species richness, species abundance, and species evenness c.

Wins or losses are the ultimate measure is competitive sports. True or false?