Competition between two species occurs when

1. Mold grows on a tree that has fallen in the forest

2. Chipmunks and squirrels eat sunflower seeds in a garden

3. A crow feeds on the remains of a rabbit killed on the road

4. A lion stalks, kills, and eats an antelope

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

What is the mass of phosphorous in a 51-kg person

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.