Four scientists investigated passive smoking. The table below shows the number of people each scientist studied from each group. scientist group A group B group C David 289 3 18 Olga 8 6 11 Peter 402 399 403 Mary 15 210 511 Which scientist is likely to get the most reliable results?

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a. coral reefs because of the loss of the symbiotic algae living within their bodies b. penguin populations because the fish they eat will move into warmer waters c. mountain-dwelling birds because rising sea levels will relocate their food sources d. large cats in the rainforest because of decreased habitat loss for their prey