Ocular lenses are close to the and are close to the object being examined. a. eye, objective lenses

Solution:

Ocular lenses are close to the  eyepiece and objective lenses are close to the object being examined.

The simplest microscope of all is a magnifying glass made from a single convex lens, which typically magnifies by about 5–10 times. Microscopes used in homes, schools, and professional laboratories are actually compound microscopes and use at least two lenses to produce a magnified image.

Thus this is the required answer.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects

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