Without energy, molecules tend to want to move from A. a low concentration to high concentration
B. a top of the mountain to the bottom
C. the bottom of a mountain to the top
D. a high concentration to low concentration​

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?