The diagram below shows two kinds of cells. A biologist wants to classify protein secretions into groups based on the principal function of the protein. Which cell would the biologist select to study and why?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

Which of the following forest management practices is best for reestablishing areas of forest?

When ash and dust begin to settle on the ground, they eventually become compacted by