Adisturbance is any relatively discrete event in time that does which of the following?

a. disrupts ecosystem, community or population structure
b. changes resources, substrate availability, or the physical environment
c. facilitates succession
d. all of the above
e. both a and b

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

About how much of the cell mass is watet

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?