Which of the following is likely to be a pioneer species?

select one:
a. shrub
b. grass
c. lichen
d. mature trees

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

The influenza virus cause the flu, but not other diseases. why?