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Lesson 3: Plants
Plants are a crucial part of many
environments, from deserts to rain
forests, from oceans to plains.
They provide animals with food,
produce oxygen allowing animals
to breathe, and provides shelter
from weather or predators for
animals. In short, without plants,
animals would not be able to
survive. Figure 2 – At the most basic level,
photosynthesis involves light energy and
carbon dioxide entering a plant and
oxygen exiting.
Finally, all plants are
multicellular, meaning they are
made of more than one cell.
Specialized groups of plant cells
working together form tissues.
Some protists, including kelp,
Figure 1 – Besides providing oxygen and seem plant like, and kelp is in fact
food, plants provide shelter for animals. eukaryotic and photosynthetic.
The cells of kelp, however, are not
What are Plants? specialized, meaning this organism
is not a plant.
All plants have three things in
common. First, they are Plant Parts
eukaryotic. This means that the
cells they are made of have nuclei. When we think about the parts of
Second, all plants engage in plants, we often thing about stems,
photosynthesis. In this process, leaves, seeds, or flowers. Many
plants convert sunlight into energy plants have these parts. However
that plants can use. In this a plant does not need to have any
process, the plants take in carbon of these parts to be considered a
dioxide, a waste product for true plant. So, instead of talking
animals and release oxygen, which about parts that all plants have,
all animals need. we’ll talk about parts that some
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