A student is observing different structures of a seed plant during a lab activity. She has identified tiny structures that look like powder.
Which structures did the student most likely identify?
pollen, which contains the plant embryos
pollen, which develops into sperm cells
xylem, which contains the plant embryos
xylem, which develops into sperm cells

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.