Eating fruits and vegetables can protect us from diseases. They contain important vitamins and minerals. Since they are low on calories, they help in weight management. It is nutritious and energizing. They contain their own combination of phytochemicals and nutrients that work together to promote good health.
Because of these physical features, the type of producers that we would expect to find in the tundra are A. lichens and low-growing moss.
Because it is usually very cold in the tundra, and there isn't much rain, but there are a lot of rocks around with no grass, the plants that will grow in such a place have to be small plants because they don't have the appropriate conditions to grow and thrive.
Answer: Meselson & Stahl reasoned that these experiments showed that DNA replication was semi-conservative: the DNA strands separate and each makes a copy of itself, so that each daughter molecule comprises one "old" and one "new" strand. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure. ... From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.
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