Curated category
Plant anatomy
- LeafIn the heart of a green leaf, chlorophyll molecules absorb light energy from the sun. This process begins when photons strike the pigment within chloroplasts…
- Vascular cambiumA cross-section of a Helianthus stem reveals the vascular cambium labeled as F. This tissue divides to form phloem on the outside and xylem on the inside.
- GametophyteA single spore from a haploid parent plant lands on damp soil and begins to divide. This new multicellular organism carries only one set of chromosomes…
- Plant stemA stem of Polygonum loses its leaves but produces adventitious roots from the nodes. This above-ground structure supports water and dissolved substances…
- WoodIn the Canadian province of New Brunswick, scientists uncovered plant fossils dating back approximately 395 to 400 million years.