Tibet is located in a mountain biome and is sometimes called the "Roof of the World." The people in Tibet are adapted to the mountain biome because they have larger lung capacities and increased
breathing rates compared with people not living in mountain biomes. Which feature of the mountain
biome would most likely cause this adaptation?
A extreme temperature change in a short amount of time.
B thin atmosphere with low oxygen and carbon dioxide levels
C exposure to harmful ultraviolet rays which require movement to find shelter
D sandy and rocky soils which require a lot of physical activity to navigate the terrain

What type of competition exsist between two species. turtles and fish

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).

Homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?