Answer:
Fine focus.
Explanation:
If you're referencing a microscope, then it would be fine focus. Coarse focus is a basic focus used to properly see a specimen, while fine focus enhance clarity and precision. To use both, you have to gently twist a knob until you can see the specimen at a desired clarity.
Here's a reference image if you need it, it's labeled all the parts of a microscope.
Answer: B. They always have offspring identical to the parent plant.
It’s A. Double stranded DNA consists of two polynucleotide chains whose nitrogenenous bases are connected by hydrogen bonds.
Answer:
to take precise measurements and do experiments