(Blank)
What are the small openings in a stem's bark that allow air to enter into the stem?
Lenticels
what is the chief factor determining when the plant flowers
length of day and night
what part of the flower covers and protects the rest of the flower during development
sepal
which of the following steps occurs first in the process of germination?
the seed begins to absorb water
what part of a flower produces pollen
anther
which of the following is not a plant hormone?
- chemotropin
- auxin
- gibberellin
- ethylene
chemotropin
what is a nut
consists of a seed enclosed in a hard, relatively thick shell; examples include acorn
what is the process of a new plant growing from a root, stem, or leaf of an existing plant?
Vegetative reproduction
what is the tough outer covering of a herbaceous monocot system?
rind
when there is a fully developed fruit on a plant, which of the following statements is always true?
an ovary has ripened
a young woody stem stores water in soft thin-walled cells at its center. what is this region called?
pith
what part of a seed's embryo develops into the new plant's root system?
radicle
which of the following is not a factor that drives the sap stream?
- secondary growth
- root pressure
- transpiration pull
- capillarity
secondary growth
what are gametes
reproductive cells, such as egg and sperm
what are the special roots that grow from unusual parts of the plant?
adventitious roots
what is the tissue that surrounds and nourishes a developing a plant embryo
endosperm
what is a berry
entire fruit is fleshy and juicy throughout
what is a legume
consists of a pod enclosing several seeds
what is a grain
produced by plants in the grass family
what is a pome
consists of an outer fleshy layer and an inner papery core
within a root food is stored in the
cortex
the process in which substances mix through random molecular motion is called
diffusion
the section of a twig between nodes is an
internode
the dispersal of dandelion seeds by the wing is an example of ______ dispersal.
agent
the part of a root tip which cells grow longer is called the region of ________
elongation
these flowers cannot be pollinated by other flowers, they must be pollinated by______
self-pollination
in some cases, plant seedlings that receive light from only one direction will bend towards the light; this demonstrates the tropism called_______
phototropism
True or False: (if false give the correct answer) The period of inactivity that occurs before germination is called dormancy.
true
True or False (if false, give the correct answer): the type of reproduction in which sperm and egg cells unite is vegetative reproduction.
False: sexual reproduction
True or False (if false, then give correct answer) The structure that covers and protects the tender root tip is apical meristem
root cap
True or False: (if false then give the correct answer) the older, inner wood of stem that serves only to support the stem is sapwood
false, heartwood
why can high salt concentration in the soil kill plants
salt pulls water out through osmosis
A ginger plant has roots that form thick and grow horizontally, what kind of root is this?
Rhizome
what is an incomplete flower?
A flower that is lacking a pistil and stamen
what happens if you remove the terminal buds from a woody plant?
the existing branches will not grow any longer, but new branches will form and grow. Since stems grow in length only at the terminal buds, the plants with terminal buds removed cannot grow longer. (new branches will grow in length as the lateral buds will become terminal buds)