A specific cell is unable to make the enzyme helicase. Because of this deficiency, what would the cell most directly be unable to accomplish? Choose the correct answer. Group of answer choices

The cell would not be able to add new nucleotides.

The cell would not be able to unzip the double helix.

The cell would not be able to fix mistakes in the DNA.

The cell would not be able to add the primer to the DNA strand.

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?

Crossing over is a method of (blank)?