Answer:D
Explanation: The pulmonary air sacs of birds only permit a unidirectional flow of air through the lungs. Unidirectional flow means that air is inhale and exhale through one trachea alternatively. This means the bird lungs only receive largely fresh air which has a high oxygen content during inhalation and do not receive fresh during exhalation. While air flow bidirectional in mammals.
lesser
Explanation:
Reykjavik the capital city of Iceland heats its buildings using geothermal energy sources at a cost that is lesser of what it would be if oil were used.
In all ramification, the use of geothermal energy sources is far more preferable and better than using fossil fuels like oil.
- Geothermal energy is energy from within the earth
- It is natural and renewable source of energy.
- The cost of product is very low
- It has little to no impact on the environment as well.
- They are usually found where magma pockets are close to the surface
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Answer:
Recessive alleles are usually represented by lowercase letters and require two copies to be expressed
Explanation:
Answer:
As insect nymphs grow larger, their exoskeleton becomes too tight and they must replace it. Once a nymph outgrows its exoskeleton it will go through a process called molting, in which it leaves the old “skin” or exoskeleton behind. The new “skin” will harden and become the new exoskeleton
Explanation:
Answer:
You have landed in a tundra.
Explanation:
Birds as in penguins
Wolves as in Arctic wolves/foxes
The ground is hard because it is frozen
The air is cold
