Answer:
The alkali metals lithium, sodium, potassium, rubidium, cesium, and francium constitute group 1 of the periodic table. Although hydrogen is in group 1 (and also in group 17), it is a nonmetal and deserves separate consideration later in this chapter.
Elements: Francium; Lithium; Potassium; Rubidium...
Explanation:
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The answer to this question is the Silurian strata. These are spores of the Psilophytes which appeared at the end of the Silurian period. The spores have been found in early Silurian rocks in Libya. Psilophytes did not have roots or leaves, but has branches carrying spore sacs that grew from an underground vine.
The answer is the first eukaryotic cells.
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Answer:
Explanation:
Learning to take care of our environment is one great change that we need to make. Our environment is everything around us if we accept the task of taking care of it many species will be preserved for long. If I have river around me and I avoid polluting it to prevent accumulation of toxins in the water bodies this will help the biomes.
When trees are preserved and not been cut down indiscriminately reducing global warming in the environment this will also help preserve biomes.