Plants in Our Lives: Predecessors of Plants

The video explores the development of the first plants, tracing them back to about 420 million years ago. It clarifies that early land plants were not tree-like but resembled mosses, lacking leaves, roots, or stems. Plants are believed to have evolved from green algae-like ancestors, which were photosynthetic organisms living in aquatic environments. The video also discusses the characteristics of algae, highlighting their ability to photosynthesize and categorizing them into three major groups based on pigment color: green, brown, and red.

How many years ago did the earliest plants appear according to the fossil record?

• 420 million years ago

• 520 million years ago

• 320 million years ago

• 620 million years ago

What were the earliest land plants most similar to?

• Trees

• Mosses

• Flowers

• Ferns

From what type of organisms are plants believed to have evolved?

• Protozoa

• Green algae-like ancestors

• Bacteria

• Fungi

Which of the following is NOT a major group of algae based on pigment color?

• Green

• Blue

• Brown

• Red

What is a common use for brown algae, such as kelp?

• Manufacturing electronics

• Producing cosmetics

• Making bread

• Creating textiles