You examine an unknown cell under the microscope and discover that the cell
contains chloroplast. what type of organism could you infer that the cell came
from?

plants or blue-green algae

Explanation:

The plants cells have chloroplasts that contain chlorophyll. When the cells are stained and observed under the microscope, chloroplast is seen. Chloroplast is only present in photosynthetic organisms. The chloroplast traps light that is used during photosynthesis.

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.