Answer:
A: Density-independent factor
Explanation:
Hope this helps!!
Sorry if I'm wrong...
Index fossils (also known as guide
fossils, indicator fossils or zone
fossils) are fossils used to define
and identify geologic periods (or
faunal stages).
According to endosymbiosis theory, the mitochondria was once free-living prokaryotic cell. The cell was engulfed by other cell (host cell) via the process of phagocytosis.
The “eaten” cell survived inside the host. The host cell provided a nutrition and safe environment to live and the future mitochondria produced energy that the host cell can use. Over time the organelle and the host cell have evolved together.
Answer:
The nervous system produces rapid responses while the endocrine system generates slow but long term responses.
Explanation:
The nervous system rapidly generates a response by sending the sensory and motor information in the form of nerve impulses. The rapid responses of the nervous system are compared with text messages that are delivered instantly to the other person.
On the other hand, the endocrine system produces a relatively slow response by releasing hormones. Therefore, it is compared with a letter that takes a few days, depending on the distance, to be delivered to the other person. However, the effects of the endocrine system are long-lasting as compared to the short term responses generated by the nervous system.
An autotroph is an organism that can create nutritional organic substances from inorganic substances