Which of the following organelles provide structure and rigidity to a plant cell? ribosome
A cell membrane
B chloroplast
C cell wall

When water freezes, it . contracts expands

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.