In order to specifically target the cystic fibrosis CFTR gene in the human genome, the Crispr-Cas 9 system for genome editing relies upon: A. An RNA guide strand B. Transcription factor consensus sequence recognition C. Restriction enzymes D. A DNA guide strand E. A viral RNA guide strand

Which is the correct formula for photosynthesis

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

What is an example of excretion in mammals?