Answer:
D. reproduction
Explanation:
If the species doesn't reproduce they die out or become extinct.
Normally tree rings will disappear, damage, or go missing when the tree doesn't have enough nutrients, another factor that contributes to that is drought.
Answer:
The study of DNA started much before the discoveries of Rosalind Franklin and Maurice Wilkins. Nucleus of cell was discovered by Robert Brown in 1831 but the material present inside the nucleus called "nuclein" (DNA) came from the studies of Johann Friedrich Miescher in 1869.
Explanation:
Answer:
Carbon dioxide
Explanation:
The carbon combines with oxygen to form carbon dioxide (CO2) and is released back into the atmosphere as a waste product when animals breathe and exhale.
