Which echinoderm is Horace most likely examining?

a sea cucumber because it uses tentacles for feeding
a sea cucumber because it has tube feet
a brittle star because it uses tentacles for feeding
a brittle star because it has tube feet

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

What goes in and out of a cell respiration?

Nucleus has two lobes; contains granules of lysosomal enzymes; functions in attacking parasitic worms and plays complex roles in inflammatory diseases like allergies and asthma. what blood cells are described?