Random changes in specific trait of a given small population
Explanation:
Genetic drift is a phenomenon which is more specific in population of small size. Usually under the genetic drift effect , a population with a specific trait tries to reproduce with population that has no such traits and hence, in long run the resulting population eventually loses this specific trait.
Thus, genetic drift causes loss of alleles that are rare and also reduces the size of gene pool. The new population is genetically distinct than the original population.
1. chlorophyll : because animals cannot produce their own food
2. Tonoplast: it is a membrane that surrounds the large vacuole in a mature plant cell and vacuoles are not present in animals cell or if present little
My guess would be H₂O/ water, since osmosis is a form of passive transport and I can't see the model the question references. Gases like O₂/ oxygen, CO₂/ carbon dioxide, and simple sugars like glucose can also pass through a cell membrane with passive transport though.
