Which one of these exhibits gill slits at some stage of its development?

A. all echinoderms

B. all mollusks

C. all cnidarians

D. all chordates

Birds have hollow bones. explain how this is adaptive.

Why do mobile advertisers care about driving physical store traffic? answer?

Smith and cuvier discoveries of simliar fossils in rock layers is a major breakthrough why?

Jennifer was investigating granite, a type of rock that forms when magma deep below the Earth's crust cools off and hardens. What type of rock is granite? A) bedrock B) igneous rock C) sedimentary rock D) metamorphic rock

How does a eukaryotic organism differ from a prokaryotic organism

After digestion and absorption which circulatory system carries fat and fat-soluble vitamins

Describe a reason that ecosystem stability is important to the life forms in the ecosystem, and then describe why stability in one ecosystem is important for stability in an adjoining one

Which part of a seed grows into a root and which plant part acts as a protective covering for a seed during seed dormancy? The part of a seed grows into a root and the acts as a protective covering for a seed during seed dormancy.

Hemophilia is caused by several genetic factors; one, a recessive allele of an x - linked gene, is the subject of this problem. assume that a man with hemophilia marries a normal woman whose father had hemophilia.

How do popular psychology and scientific psychology differ