- germination of the embryo within the seed does not take place until:
- T or Fthe way water travels up the length of the stem is explained by the cohesion-adhesion-tension theory
- male gametophytes are also known as ____________ and they develop into microspores.
- when a plant blocks fertilization after recognizing pollen as genetically related, this is called:
- the phenomenon known as phototropism is due to the plant hormone ____________, which regulates cell growth
- ________________ are outgrowths of the epidermis that occur on the shoot.
- phloem of angiosperms is made up of _______________, lined up end-to-end, forming tubes.
- when applied to underripe fruit, the hormone ____________ hastens ripening.
- the process by which water leaves a plant is called:
- which type of vascular tissue conducts carbohydrates?
- some plants reproduce asexually through horizontal stems called:
- the two principal types of conducting cells in the xylem are ___________ and ___________.
- the ___________ of materials moved through the phloem occurs because of water pressure.
- of the nutrients needed for plant growth, active uptake of _____________ regulates turgor pressure within cells of leaves
- the growing center that gives rise to outer layers of bark on both root and shoots is the
- within the epidermis of leaves are _____________ through which gases, such as carbon dioxide and oxygen, pass.
- in a mature tree, the point where the bark can be peeled off the wood is where the ______________ lies.
- _________________ cells provide support for plant organs in which secondary growth has not yet occurred and are alive at maturity
- in plants, primary growth occurs at a growing center called an
- Cell in the tissue are usually connected via