1. What is the difference between ocular and objective lenses?

The ocular lens is positioned at the top of the of the optical tube and the objective lens is positioned at the bottom.

Explanation:

Got this from Google. Hope this helps!

The occular lense is where you look into the microscopic veiw of the specimen on your microscope by 10x magnification. It is attached to the body tube. Objective lenese further magnify the image. There are often 3 lenses but some have 4. Low- 4x power, Med-10x power and light- 40x power.

Explanation:

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.