During which time period did land plants, insects and vertebrates animals first appear?

In sexual reproduction do parent cells need to be diploid?

Unlike toads, tortoises A. have amniotic eggs. B. have lungs. C. have true bone. D. have jaws and paired appendages.

Which best describes the function of the cell wall in cells? A. maintains the cell's nuclear structure B. moves materials within the cell C. supports the frame of a cell D. modifies sugar into usable energy

Why are communities that are more diverse usually more stable?

How did the view of the solar system change between Ptolemy and Kepler?

Why does the lipid bilayer self assemble?

3. In pea plants, inflated pods are dominant to constricted pods. Show the cross between a true-breeding inflated pod plant with a true-breeding constricted pod plant.

How might a scientist a determine whether trait sex-linked by observing the offspring of several genetic crosses

An individual who has an eating disorder along with intense thirst and wildly varying body temperatures may have a dysfunction of the medulla. hypothalamus. thalamus. pons. brainstem.

What consists of loose connective tissue that binds the tunica mucosa to the next layer