What does it mean for a cell membrane to be selectively permeable?
(a) it allows some substances to pass through but blocks the passage of others.
(b) it allows molecules to pass through if they are under a certain size.
(c) it allows only water molecules to pass through.
(d) it blocks the passage of most substances.

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment. svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment. svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment. svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution