The two primary functions of a tree's bark are protecting the and helping transport throughout the plant.
Five types of vegetative propagation are cutting, layering, , and tissue culturing.
Identify five types of tropism and the stimulus that causes each: * - caused by light * geotropism - caused by * - caused by chemicals * hydrotropism - caused by * thigmotropism - caused by
Pick the five important plant hormones:
cytocide
cytokinins
auxins
auxeses
gibberellins
gibberish
abscisic acid (ABA)
ascorbic acid
ethylene
ethanol
Seven examples of special stems are: , corms, rhizomes, , , tubers, and thorns.
What are the differences between tracheids and vessels? are long, narrow, rod-shaped cells with strong thick walls. are larger than and are composed of shorter, wider cells joined end to end. are not as strong as , but they allow water to be transported through them much faster.
The purpose of pith in a young plant stem is storage.
How does the internal structure of herbaceous MONOCOTS differ from that of herbaceous DICOTS? Herbaceous lack a rind (an extra covering that supports the plant), whereas herbaceous have a rind. Herbaceous have vascular bundles arranged in a ring around the pith, whereas herbaceous have vascular bundles scattered throughout the stem. Herbaceous have vascular cambium between the xylem and phloem, whereas herbaceous usually lack vascular cambium.
Seedless plants are propagated by (and other types of vegetative propagation).
How does a root grow longer and thicker? A root grows longer (primary growth) as cells divide, increasing the number of cells in the root and causing it to grow in length; additional length is produced by the elongation of cells just behind the meristematic region. As the root matures, an additional layer of cells develops, called the cambium. cells divide and allow the root to grow thicker. (secondary growth)
What are the purposes of the root cap? One purpose is to the tender as it pushes through the soil. Another purpose is helping the root push through the more easily. Also, it is used to the root in the proper direction.
Why are the terms 'xylem' and 'wood' sometimes considered synonymous? Both terms refer to the strong, resilient section of a woody stem that conducts or sap upward from the roots to the leaves.
Describe the microscopic features that would allow a botanist to distinguish a spine from a thorn. have the internal features of a leaf, while have the internal features of a stem. The following are some examples. contain mesophyll; do not. have stomata and guard cells; have lenticels. do not contain wood; the of woody plants do contain wood.
How do root hairs help a plant to absorb water and nutrients from the soil? By providing a very large for absorbing water and nutrients from the soil by .
How does osmosis differ from simple diffusion? is the process of mixing molecules of one substance through another by random molecular motion. is a type of diffusion that occurs when a semipermeable membrane allows some substances to pass through it but not others.
