A - The alveoli have a membrane that is only one cell thick to allow for a short diffusion time to capillaries.
Answer:
secondary structure ... hydrogen bonds...
Explanation: Some regions of a polypeptide may coil or fold back on themselves. This is called secondary structure, and the coils or folds are held in place by hydrogen bonds.
As the individual body size of an organism increases, the population density for this organism in a given habitat tends to decrease.
<span>It has been shown that an inverse relationship between the size of an animal and its local abundance exist. Animals with larger body size have higher energetic requirements, resource exploitation, and susceptibility to predation and thus the competition is bigger. Yet, the density–body size relation depends on the physical complexity of the habitat and population of a species.</span>
The best answer is D because construction would be bad for the environment and take up space on the soil that is trying to be preserved. Also, for C, planting only one crop type in soil is not very beneficial to the soil at all. IT is best to plant multiple crops in the soil and move the crops to different parts of the soil each year when planting them.
Answer:
filum terminale
The filum terminale is a thin strand of pia mater that helps anchor the conus medullaris to the coccyx
