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

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?