How are inducible and repressible operons similar

Which of the following organisms has the highest reproductive potential? A) dogs. B) bacteria. C) elephants. D) humans.

You have a DNA sequence that codes for a protein and is 105 nucleotides long. A frame shift mutation occurs at the 85th base how many amino acids will be correct in this protein? show work and explain answer

In the lungs, oxygen diffuses into the bloodstream, and carbon dioxide diffuses out through _[blank]_. veins alveoli arteries kidneys

There are currently hundreds of abandoned mines across the United States. The U. S. Environmental Protection Agency is leading a program in which surface contaminants at abandoned mines are cleaned up and properly disposed of.

Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid? A. The animals at each level use energy, so only a small amount of their energy is available to the next level. B.

Joel always atends the dentists and all his physicians regularly this is a important part of negative peer preasure positive ^ spreading disease disease prevention

Which selection is a characteristic of both living and non-living things? A) They both use and obtain energy. B) The same atoms and subatomic particles can be found in both. C) They are both made of cells. D) They both have a metabolism.

A moss-covered log is overturned by a hungry bear looking for insects to eat. The bear disturbs an ant colony, and some chipmunks leave the hollow log to search for another home in the forest.

1. What is the word for a type of communication that goes from cell to cell 2. What is the word that means "within the cell," such as referring to signals moving from one place to another within the cell? 3.

How is the earth like a closed system? A. Matter but not energy moves through the system B. Matter does not move in and out of the system but energy does C. Matter and energy does not move through a system D.