What is the number one determining factor in the types of organisms that can live in a body of water?
temperature
density
distance from people
salinity

Christie's doctor recommends that she eat 40 grams of protein a day. she's already consumed 50% of her protein recommendation for the day. how many servings of the given snack should christie have to meet her daily protein recommendation?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Aboy with an extra x chromosome probably has which of the following syndromes?