Hummingbirds' small size allows them to hover while extracting nectar from various flowers. This same small size requires large amounts of calories to maintain body temperature because
a. the breeze from their flapping wings constantly cools them off.
b. hummingbirds only eat at night.
c. they have a large body mass relative to their surface area.
d. hovering requires less energy than forward flight.
e. they have a large surface area relative to their body mass.
E
You might also like to view...
In vascular plants, water transport only works if ___________. (Select all correct answer options.)
A. roots are able to generate turgor pressure B. the water column is continuous between leaves and soil C. H2O evaporates from leaves D. xylem and phloem are in close proximity
The total number of individuals in a given area is the ____
a. age structure b. population density c. total fertility rate d. demographics e. population diversity
The fluid-mosaic model of membrane structure includes the following:
a) mobile components that can engage in transient or semi permanent interactions b) membrane proteins c) all of the choices are correct d) a lipid bilayer
The accumulation of glucose 6-phosphate inside a bacterial cell via phosphorylation of glucose is an example of
A. facilitated diffusion. B. group translocation. C. osmosis. D. plasmolysis. E. diffusion.