LIFE SCIENCE

Detailed explanation-1: -Ancestors of green plants began to colonise the land about 500 million years ago and it is generally accepted that they evolved from streptophyte algae (a group of green, fresh water algae).

Detailed explanation-2: -All green algae (Chlorophyta) and plants share a common evolutionary ancestor. They both contain the photosynthetic pigments chlorophyll a and chlorophyll b. The two lineages diverged between 630 million and 510 million years ago.

Detailed explanation-3: -Plants, animals and bacteria share a common ancestor, known as LUCA (the Last Universal Common Ancestor). A later common ancestor, LECA, is shared by all eukaryotes (Last Eukaryotic Common Ancestor).

Detailed explanation-4: -Land plants are thought to be the most closely related to green algae, more specifically, a group of green algae known as charophyceans. Not only do both land plants and green algae produce chlorophyll a and b; Land plants, for example, have cellulose cell walls, as do green algae.