A - The alveoli have a membrane that is only one cell thick to allow for a short diffusion time to capillaries.
1:3:3:9 is the correct answer
Answer:
Yes...
Explanation:
Hypothesis is a proposed explanation made by reasoning without assuming what the truth is..
From the question;
Formal hypothesis: Eating chocolate may cause pimples because chocolate will result to an increment in the amount of oil in the skin and this will result in pimples.
2. Salt in water can affect plants growth.
Formal hypothesis: plants grow beside the ocean will grow slower because the salt present in the soil will destroy the root of plants.
Answer:
plants either get adapted or eaten by predators
22. D, that means the soil uhhhh helps the roots to grow??? Also because sunlight causes photosynthesis- sorry i’m not good at this hope it helps
