7 Sweat glands in the ______________ cool body on hot days.
hairs
legs
head
skin
8 Lungs enable mammals to use atmospheric _____________.
nitrogen
carbon
carbon dioxide
oxygen
9 A rigid exoskeleton is a characteristic of the phylum __________________
mammalia
arthropda
chordata
pisces
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
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