Why do researchers prefer to use embryonic stem cells instead of adult stem cells ?

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

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

Acommon kind of mechanical weathering is called