High-flying birds are able to obtain enough oxygen even when the air is very thin because

Where do producers belong in a food chain?

The nucleus of an atom contains

Which type of plate boundary produces seafloor spreading? Convergent boundary Divergent boundary Transform boundary All of the above

The process by which two species evolve in response to changes in each other over time is called a. convergent evolution. b. adaptive radiation. c. coevolution. d. punctuated equilibrium.

6. the part of the circulatory system that brings carbon-dioxide filled blood to the lungs cell

Areas of land covered with water for at least part of the year are called

What is the correct sequence for the events of mitosis, meiosis, fertilization, and birth in sexual reproduction?

What must be presented in orders for cloud to form

When so few members of a species reamin that it can no longer play its role in the biological communities where it is found, the species has undergone?

Describe what type of macromolecule lactose is and what the monomer of the macromolecule is