Answer:
The correct answer would be D.Alveolar sacs are surrounded by thin capillaries where gases can be exchanged.
Alveoli are tiny sacs which form the site of gas exchange in the lungs.
The features of alveoli which help in gas exchange are:
- They increase the surface area in the lungs thus, more space is available for gas exchange.
- They have very thin walls, as thin as the thickness of a single cell only.
- They are surrounded by a bunch of thin capillaries which exchange gases with alveoli.
<span>b. temperature and climate are not part of an ecosystem
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Match each biodiversity restoration method to its description we have:
- reforestation: using plants to absorb harmful compounds
- biological augmentation: using plants to control a native plant population
- bioremediation:using plants to increase biodiversity and food resources
<h3>What are ecological restoration techniques?</h3>
Some examples of induced ecological restoration methodologies are the conduction of natural regeneration, nucleation techniques, enrichment or diversity planting, among others.
In this case, the ecological restoration techniques are:
- reforestation: using plants to absorb harmful compounds
- biological augmentation: using plants to control a native plant population
- bioremediation: using plants to increase biodiversity and food resources
See more about ecological restoration at brainly.com/question/1331136
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Relative age dating<span> is the science of determining the relative order of past events using comparative data, which does not necessarily determine the </span>absolute age<span>. It proposes an estimated age, using the data of what has been more recently deposited on the surface, and fossils age is compared to the estimated age of the rock and residue in the area being excavated.</span>
Macro economics is the study of aggregate economy from a branch in a general view while Micro goes into various branches into specific conditions of the economy