I would have to say (D.) if it's been 150 years.
The stem has more things to transport that's why it has more vascular bundles. The roots only get water from the ground and moving nutrients from the soil to transfer it to the stem. Having more vascular bundles helps the stems to transfer things to leaves and other parts of the plants.
Answer:
cold
Explanation:
the ones that flow out from the equator are warm, while the ones that flow towards the equator are cool
Polar ice cap
Explanation:
The polar ice cap is an area on the earth that extends from 66.5° north and south of the equator to the poles.
The polar ice cap is an area of very low temperature and the surface is mostly covered by ice.
- The vast polar ice caps the earth's northern and southern limits.
- This is the region of the Arctic and Antarctic circle.
- This region receives diffused solar radiation from the sun.
- This is why they rarely warm up.
- The region of the equator has no ice because they receive direct sunlight.
- The soil here is frozen.
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Tundra brainly.com/question/2334099
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The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.
