Why is it important that the xylem is adjacent to the phloem?

Which statement best describes the role of gene expression in cells? Question 1 options: Cells destroy the DNA of genes that they do not use. When cells divide in mitosis, they pass on only the genes that are required.

When DNA is copied, sometimes a new, incorrect, base pairing appears within the structure of a new DNA molecule replacing original base pairs. This mistake is called a base-pair a. deletion b. institution c. Substitution

Which of these is a biotic factor in a beach ecosystem

I have moist skin but no scales and 2 pairs of legs. Although i have lungs and live on land, my young live in water and use gills to breath.

Ant lions are small insects that dig funnel-shaped depressions in sandy areas. They hide in the dirt at the bottom of the funnel.

Torri and Tamara are both performing scientific investigations on the learning capabilities of mice. In Torri's experiment, she sets up two knobs in a cage with a mouse. When the mouse touches the knob on the left, it receives a small shock.

What did Chargaff discover while studying bases in the DNA of organisms?

Russia's system of government and identify its basic structure.

Which statement about the light microscope is correct?

How does the body use cholesterol for digestion and bile acids?