Which of the following involves only abiotic factors? A. a large rock being weathered by wind and rain
B. an otter using a stone to break open a sea urchin
C. a spider building a web in the corner of a building
D. a pine tree absorbing light from the Sun

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind

Which is the most dominant generation in a liverwort

The cellular plasma membrane is selectively permeable, which means some materials move through it while others cannot. the movement of materials into and out of the cell is called membrane transport. this activity will you identify the different mechanisms of membrane transport