Which is a function of the cell membrane?

A. performs photosynthesis

B. controls what enters and leaves the cell

C. protects the external structures of the cell

D. provides energy to the cell

How does the ability to produce artificial HGH affect human life?

What is gel electrophoresis used for

Lily plants have 24 chromosomes. if a lily leaf cell undergoes mitosis, how many chromosomes will each daughter (new) cell have?

Which disorder is degenerative and caused in part by a deficiency of the neurotransmitter acetylcholine?

A scientist performs an experiment. His results do not support his hypothesis. Which of these should the scientist do?

What conditions make for a violent volcanic eruption? a. Magma that can flow easily b. Magma with low gas content c. Magma with low silica content d. Magma with high viscosity

How do cells in a multicellular organism become specialized? A. Genetic recombination determines which genes are located in each cell within a multicellular organism. B.

How are proteins and nucleic acids related? They both provide energy. They both carry genetic information. The structure of proteins is determined by nucleic acids. The subunits of nucleic acids are also the subunits of proteins.

What water property allows bugs to walk on water

What is the most important nerve of the digestive tract?