Final answer:
Joey faces challenges in conducting his experiment on plant cells using the compound microscope due to the missing objective lens, non-functional course adjustment knob, and broken eyepiece lens.
Step-by-step explanation:
Joey faces several challenges in conducting his experiment on plant cells using the compound microscope due to the missing objective lens, non-functional course adjustment knob, and broken eyepiece lens.
The missing objective lens would make it impossible for Joey to obtain clear magnified images of the plant cells. The objective lens is responsible for magnifying the specimen, and without it, Joey would not be able to observe the cells properly.
The non-functional course adjustment knob plays a crucial role in focusing the microscope. Without it, Joey would struggle to bring the plant cells into focus, making it difficult to study and analyze them accurately.
The broken eyepiece lens also poses a challenge for Joey. The eyepiece lens is responsible for magnifying the already magnified image from the objective lens.
With a broken eyepiece lens, Joey would not be able to further magnify the image, limiting his ability to observe the plant cells in detail.