Plant Growth and Development

This one around growth and development of plants so plants are able to grow throughout their lifetime through the presence of undifferentiated tissues called meristems now when we look at this word undifferentiated we are reminded of their own stem cells within our bodies they’re not nerve cells they’re not muscle cells they’re not skin … Read more

Gymnosperms: Long-Distance Pollination

As we move through the evolutionary history of vascular plants, getting closer and closer to the present, the next group we must discuss is gymnosperms. Gymnosperms are the first of two kinds of true seed-bearing plants called spermatophytes, and the word “gymnosperm” means “naked seeds” because their seeds do not exist within chambers such as … Read more

Angiosperms: Flowering Plants

Angiosperms are the second kind of true seed-bearing plants called spermatophytes, and they are also known as “flowering plants.” If you were to imagine a flower, any type of flower you can think of, you are almost certainly envisioning an angiosperm. Even though gymnosperms also technically have flowers, the angiosperms have a much broader diversity … Read more

Plant Responses to the Environment: Tropisms and Defenses

We mentioned a plant hormone called auxin which allows plants to possess a sense of direction. Auxin, along with several other chemicals found in plants, is responsible for plant tropisms, which means movement or growth towards or away from a stimulus. A positive tropism is growth or movement towards a stimulus, and a negative tropism … Read more

Mechanisms of Plant Growth

Plants grow and develop in several ways, but they all start with the meristem cells that we talked about earlier in the series. As a refresher, meristematic cells are undifferentiated, meaning that they don’t have a specific job assigned to them when they first form. That means that when meristem cells divide, they can produce … Read more

Types of Plant Tissues

Plants have three main types of tissues, and all of these tissues are comprised of the plant cells we discussed in the previous tutorial, so let’s go through these types of tissue now. First up, ground tissue makes up the majority of a plant’s body, so to speak, and it’s broken up into three subgroups … Read more

Types of Plant Cells

Plants are living organisms, so like any other organism on the planet, we know that they must be made of cells. And more importantly, plants are rather large multicellular organisms, so we should say they are made specifically of eukaryotic cells, just as all multicellular organisms are. As we learned in the biology series, eukaryotic … Read more