Euglena can be classified as both eukaryotic and single celled organisms, more specifically it is a protist.
Some molecule can pass through but others cannot because they are too large to pass through. This is also called selective permeability.
When chemicals break down material over time.
Answer:
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the world. The earliest roots of science can be traced to Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE.
Explanation:
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migratory bird is a bird that travels from one place to another at regular times often over long distances. ... Most native birdspecies (birds naturally occurring in the United States) belong to a protected family and are therefore protected by theMigratory Bird Treaty Act.