Athin, flexible, semipermeable barrier around the cell which regulates what enters and leaves the cell.
example: gatekeeper for the cell.

Where can you find prokaryotic and eukaryotic cells?

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

Which greenhouse gas is emitted when burn fossil fuels for energy? a. nitrogen b. oxygen c. carbon dioxide d. helium