Which pair of structures would provide a positive identification of a plant cell under a microscope? 1. plasma membrane, large central vacuole

2. cell wall, mitochondria

3. ribosomes, chloroplasts

4. cell wall, chloroplast

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Give an example of a trait that is controlled by more than one gene.

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.