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The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past
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Threats to the tundra biome
The oil, gas, and mining industries can disrupt fragile tundra habitats. Drilling wells can thaw permafrost, while heavy vehicles and pipeline construction can damage soil and prevent vegetation from returning. This activity also increases the risk of toxic spills.
What is the environment like in the tundra?
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy, and rainfall is scant. Tundra lands are covered with snow for much of the year, but summer brings bursts of wildflowers.
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Brainliest please?
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1. The animal can't see what happening behind its head.
2. Head can be moved upto 180 degree angle in most of the animals including humans. But it is not true in case of birds.
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Explanation:
These pathogens include, but are not limited to, hepatitis B virus (HBV) and ... Contaminated Laundry means laundry which has been soiled with blood or other ... (3) Any other procedure involving the potential for occupational exposure to ... Food and drink shall not be kept in refrigerators, freezers, shelves, cabinets
