Based on the notes, what are two key characteristics that define plants and why are plants referred to as autotrophs?

Here are some practical questions based on the provided notes:

• a) According to the text, what are two key characteristics that define plants?
• b) Why are plants referred to as "autotrophs"?
• c) Name three components of a plant's shoot system, as identified in the text and diagram.
• d) Based on the text, what is the primary role of plants in the Earth's ecosystem?

Here are the answers:

a) Two key characteristics that define plants are that they are multicellular, photosynthetic eukaryotes and they belong to the kingdom Plantae.

b) Plants are referred to as autotrophs because they are capable of producing their own food through photosynthesis.

c) Three components of a plant's shoot system are flowers, fruits, and leaves. Other valid answers include stem and buds.

d) The primary role of plants in the Earth's ecosystem is that they are the primary producers.