I think the answer is either b or c
Answer:
yes
Explanation:
because a biotic factor can be living or nonliving, so a living thing CAN kill another living thing... at least I think
Most fish (especially the "Bony fish") achieve neutral buoyancy through a sac called the swim bladder in there body of which is filled with air, not much but it'a just enough to keep then a float. The fish can control this organ, and using that they can fill or release air to allow them to rise or sink.
Cartilaginous fish however, do not have a swim bladder.
hope this helps :)
11. What did Charles Darwin think about on his journey home to England?
He noticed the many patterns of diversity in most species and how these differences varied from island to island
12. After Charles Darwin returned to England, what hypothesis he develop to explain his findings?
Separate species arose from a common ancestor.
Answer:
answer is C spermatogenesis