The statement that best compares gymnosperms and angiosperms is : A. Both reproduce sexually, but gymnosperms contain only xylem and angiosperms contain xylem and phloem.
Gymnosperms produce exposed seeds, not enclosed in fruit whilst Angiosperms have Fruits, flowers, and endosperms as defining characteristics.
Answer:
Agriculture and domestication probably started in the Fertile Crescent (the Nile Valley, The Levant and Mesopotamia). ... People probably started agriculture slowly by planting a few crops, but still gathered many foods from the wild. People may have started farming because the weather and soil began to change.
Explanation:
Answer:
Main sequence, red giant, white dwarf.
Explanation:
- The life cycle of the sun is called as solar cycle and is the phase of solar development. There are about seven-stage in its life cycle. Starting with the birth of the sun that is found in the solar nebula theory took place about 4.56 billion years.
- The sun starts to enter the T Tauri stage, followed by the main sequence stage where the sun is currently in. After this stage that is when the sun runs out of hydrogen from its core.
- It will produce violent helium flashes and will shrink its size. When this happens it will reach the tip of the red giant stage. Later on, the naked core will form into a white dwarf.
The period of revolution of an object in the Solar System is the time it takes an object to travel around the Sun.
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