not really sure cuz this is biogeography and this not my field, but i think (C) is the correct answer (a biome may include multiple ecosystems that share a smaller climate).
A microscope was nessecary to observe cells.
Answer:
The characteristic that are found in phytoplankton is the presence of chlorophyll which is absent in whales.
Explanation:
Phytoplankton are eukaryotic organisms which has the ability to converts solar energy into the chemical energy in the process of photosynthesis. They are also called autotrophic organisms i. e. make their own food like plants but they are not plant. They are basically algae while whale is a eukaryotic mammals which are heterotrophic in nature which means they are unable to make their own food.
The answer is D! birds have to migrate for winter to find an abundance of food! they learned this over time making it a learned adaptation