Answer:
it is 1 3 and 7 cause all those explain mineral
Explanation:
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Answer:
The Earth is essentially a closed system; it obtains lots of energy from the Sun but the exchange of matter with the outside is almost zero. Isolated systems can exchange neither energy nor matter with an outside system.
The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time.
Answer:
The appendix is a warehouse for symbiotic bacteria for the digestive tract after an illness. it then "reboots" the digestive tract by giving it the bacteria to help it recover.
Explanation:
The true purpose of the appendix is uknown, however this is a hypothesized function that invovles it with the digestive system.
Alleles are two different forms of a single gene.
First blank space is endocrine system and the second blank is hormones
