D. limited resources. When individuals in a population compete, they compete for resources, because resources are scarce. Hope this helps. Please rate, leave a thanks, and pick a brainliest answer (Not necessarily mine).
Respiratory system and Circulatory system :P
Answer:
Taphonomy helps us understand the processes that impact the fossil record, or how many fossils have been found, and what sort of information was obtained from them.
the answer is D FYI just took the test
Answer:
It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.