Where's a reflecting telescope uses to gather light a refracting telescope uses
a. a lens; a curved mirror
b. a curved mirror; a lens
c. prime focus; focal length
d. focal length; prime focus

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?

2. which is the last step in the scientific method?

The structure that houses the cells genetic information.