Chapter 34
Plant Structure, Growth, and Nutrition
From Water to Land
Kingdom Plantae first appeared about 410 million years ago as green algae transitioned from water to land. This land was a…
The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological…
Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and…
The primary organs of vascular plants are roots, stems, and leaves, but these structures can be highly variable, adapted for the specific needs and…
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of…
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many…
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light…
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching…
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that…
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the…
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth,…
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend…
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the…
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability.…
Plant adaptation to biotic and abiotic stresses is governed by a variety of factors, among which the regulation of stomatal aperture in response to…
Lateral root development contributes significantly to the root system, and hence is crucial for plant growth. The study of lateral root initiation is…