Answer:
3.
Explanation:
There is no diversity in asexual reproduction.
D best describes mutation
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This energy most directly results from the life activity of respiration.
The hummingbirds have very high energy expenditure (have the highest oxygen requirements of all vertebrae) with a fast heart rate, very fast wing beats and sustained hovering. So the hummingbird is nearly always on the edge of starvation, needing to take in more nectar than its body weight each day.
The respiratory system of these birds is highly adapted for the high oxygen needs. So, the muscles of the hummingbird cause pressure changes within the air sacs. As a result, more oxygen can enter the respiratory system. Also, they have the highest density of red blood cells which allows them to rise heart beat to around 500 breaths per minute during flight.
Moss isn't fussy as to conditions. It needs shade--the more the better--moisture, acid and rather poor soil; exactly the opposite, in most ways, from grass. You can try transplanting moss from the woods, but the best way to acquire species that will enjoy your site is to make sure the soil is acidic, water it a bit in dry spells and wait to see what turns up. One exception is lawn moss. This is often a more sun-tolerant species and you can usually get quite a bit just by raking it out of a lawn. Try it as a mulch around flowers or shrubs.
