What type of compounds always contain carbon and hydrogen

What is meant by partially permeable membranes.

Which feature of the earth system is caused by the movement of ions in earths core

Does the distribution of bases in sea urchin DNA and salmon DNA follow Chargaff's rules? a) Yes, because the %A approximately equals the %T and the %G approximately equals the %C in both species.

Which organelle do you inherit from your mother?

What does turgor pressure mean?

What is a radical?

A series of waves with decreasing wavelength labeled A, B, C, D, E, F, G from left to right as wavelength decreases.

Cameron is collecting data to determine the time of completion for each stage of germination in seeds. He is using bean seeds for his investigation and recording his results. He repeats his data collection many times to obtain reliable results.

Which human action has not lead to significant changes in Earth's biomes?

Which two characteristics of living things do viruses exhibit?