An ecological pyramid is a model which depicts number of organisms biomass and productivity at each trophic level. which of the following terms does not apply to the bottom level

a. photosynthesizing
b. herbivore
c. autotrophic
d. producer

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans

Which feature would you expect to find in a population in which sexual selection depends on male competition?