Amembrane that only "lets" certain molecules in while keeping other molecules out is

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Where in the cell are ribosomes made?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.