What is true about all neurons? A. They are bundled together in nerves that are surrounded by a protective sheath.

B. They all transmit signals through axons and receive neurotransmitters through dendrites.

C. They each bring nutrients to the brain and produce a fatty protective layer called myelin.

D. They all send signals from the brain to the body through long axons in the vertebral column.

Which best describes carbon dioxide’s path out of the body

The smallest parts of these that retain their original properties are called

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .