Which sentence does not describe a structural adaptation?

a.
an elephant has a long trunk that it uses to reach leaves high in a tree.

b.
a dog walks to a stream and drinks when it gets thirsty.

c.
a hummingbird has a long, thin beak to sip nectar from flowers.

d.
a rosebush has thorns to protect it from animals that might eat it.

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food