(Q).
You are presented with the question "what can radioactive dating determine the age of?" and the following answer choices: - blastoids - h2o - most cephalopods - sea urchins - one celled organisms - dinosaur bones - humans - nuclear power Now knowing that radioactive dating is used to determine the age of fossils and dinosaur bones, like many other artifacts, are fossilized, choose the best answer.
(A).
dinosaur bones

(Q).
You are presented with the question "What are bird beaks often adapted to eat?" and the following answer choices: - moles. - fish - nests - chicks - trees - apples - edible - Fruits Now knowing that bird beaks are generally adapted for the food they eat and birds eat the fish, algae and human food, choose the best answer.
(A).
fish

(Q).
You are presented with the question "What phylum do starfish belong to?" and the following answer choices: - fertile - animals - Echinoderm. - Mollusca. - Sponge. - Absorb light - Annelid. - a fish Now knowing that echinoderms have a unique water vascular system with tube feet and each starfish arm is lined with tube feet, choose the best answer.
(A).
Echinoderm.