Build several models of his tree house out of different materials, and see which model holds up best to wind, water, and ice.
Answer: Posterior HoxA and HoxD genes play important roles in patterning along the proximodistal axis of the forelimb (10–13). They also are required for activating and maintaining Shh expression in the developing forelimb (6, 7). mark brainliest
Explanation:
The correct answer is emphysema.
This respiratory disease occurs when alveoli get enlarged, and thus cause chronic lung inflammation and later on lung fibrosis as well. This person then finds it extremely hard to breathe properly, as airways tend to collapse during expiration.
The answer would be C because it goes population community ecosytem then biosphere poulaton always comes first
Answer:
The Earth is 4.6 Billion years old.
QUESTION 2:
Option A is the correct answer.
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