about a half an inch long, looks like a black and white teardrop
The logical answer is that it looks like a sunflower because that's what it becomes.
sunflower
A sunflower seed is an achene which means a simple dry fruit. The sunflower seed are referred to as the fruit of the Sunflower because it is produce by the plant.
in late spring,sunflower seed will germinate
There is no need to do this with domesticated sunflower seed.
The shell of a sunflower which is white and black striped protects the seed inside of it. The seed, if planted becomes a sunflower plant.
No, it is a dicot.
Short answer: Yes, the seed hulls are similar as they are both "asters".Nyjer and sunflower seeds are popular bird attractors at the winter feeding station. Both seeds have an edible oil, though it is the sunflower that became a production crop in the U.S. Actually "niger" or "nyjer" (Guizotia abyssinica) is a close relative of the sunflower, as they are both from the Asteraceae (Aster) family (nyjer not a thistle -that was a marketing ploy by birdseed producers, believe it or not!). The Aster family has a specialized fruit covering called a "cypsela". If you look at the nyjer seed very closely with a magnifying glass, you can see how similar it is to the sunflower, especially the black oil sunflower seed.
Pumpkin seeds or Sunflower seeds.
Sunflower seed oil is used to make fine art paint.
A sunflower seed is the fruit of the sunflower. The seed is referred to as a achene when it is inside of its shell or pericarp.
sunflower seed