The Ordovician is best known for its diverse marine invertebrates, including graptolites, trilobites, brachiopods, and the conodonts (early vertebrates). A typical marine community consisted of these animals, plus red and green algae, primitive fish, cephalopods, corals, crinoids, and gastropods.
Answer:
A living thing I think try that
CTATA GGAAG ATGGA. Switch Cs to Gs vice versa. Switch Ts to As vice versa.
Answer:
The top of a worm is the dorsum or it can be said to be the
dorsal surface.
Answer:
Nothing will happen.
Explanation:
Nothing will happen to the octopus population if the number of snails decreased or extinct in the area because there are many other organisms on which octopus can feed. Octopuses feed on crabs, small fishes, clams, snails, and on other octopuses so if other food sources are available to Octopus so there is no effect on the Octopus population but if there is no other food source then the Octopus population will definitely decreases due to lack of food.