Abeka 10th grade Biology test 2
endosperm
What is the tissue that surrounds and nourishes a developing plant embryo ?
xylem
Wood is another name for______ tissue
chemotropin
Which of the following is not a plant hormone ?
Vascular cambium produces xylem and phloem , which are in the wood and bark
Which of the following statements best explains why the vascular cambium of a woody stem is located between the bark & the wood
stigma
29 .
style
30 .
agent
The dispersal of dandelion seeds by the wind is an example of ? dispersal .
heartwood
The older inner wood of a stem that serves only to support the stem is
sepal
What part of a flower covers and protects the rest of the flower during development ?
The seed begins to absorb water
Which of the following steps occurs first in the process of germination ?
legume
consists of a pod enclosing several seeds
nut
consists of a seed enclosed in a hard , relatively thick shell ; examples include acorns
Salt pulls water out of the roots through osmosis
explains why high salt content in soil can kill plants ?
A strawberry grows from a single flower with several pistils
why is a strawberry is considered an aggregate fruit
ovule
31 .
receptacle
32 .
elongation
The part of a root tip in which cells grow longer is called the region of ? .
dormancy
The period of inactivity that occurs before germination is called
diffusion
The process in which substances mix through random molecular motion is called ?.
incomplete flower
Vincent is examining a grass flower . He finds stamens , pistils , and tiny sepals Upon further inspection , he finds that the flower lacks petals but has bracts . In which of the following categories does the flower belong ?
radicle
What part of a seed's embryo develops into the new plant's root system ?
pome
consists of an outer fleshy layer and an inner papery core
berry
entire fruit is fleshy and juicy throughout
grain
produced by plants of the grass family
pith
A young woody stem stores water in soft , thin - walled cells at its center . What is this storage region called ?
self - pollination
Certain types of grass plants have flowers that develop underground and never open . Because they cannot be pollinated by other flowers , these flowers must be pollinated through the process of ?.
sexual
The type of reproduction in which sperm and egg cells unite is ________reproduction
transpiration pull, root pressure, capillarity
factors that drives the sap stream ?
lenticels
What are the small openings in a stem's bark that allow air to enter the stem ?
adventitious roots
What are the special roots that grow from unusual regions of a plant ?
length of day and night
What is the chief factor determining when a plant flowers ?
pollen tube .
After pollination takes place , the first step in fertilization is the formation of a
phototropism
In some cases , plant seedlings that receive light from only one direction will bend toward the light ; this demonstrates the tropism called ___ ? ___ .
stamen
33 .
pedicel
34 .
gametes
Reproductive cells , such as egg cells and sperm cells , are called ?
internode
The section of a twig between nodes is a ( n ) ___ ? __
rhizome
The spice ginger comes from an underground stem of the ginger plant ; new plants form as these thick stems grow horizontally What type of special stem does the ginger plant have ?
root cap
The structure that covers and protects the tender root tip is the
cotyledons
The structures of a plant embryo that contain energy needed for sprouting are the stored food to supply the
root hairs
The tiny , tube - like projections that extend from the epidermal cells of a root to absorb water and minerals are
vegetative reproduction
What is the process of a new plant growing from a root , stem , or leaf of an existing plant ?
rind
What is the tough outer covering of a herbaceous monocot stem ?
spreading branching
What type of branching does the pictured tree exhibit ?
An ovary has ripened .
When there is a fully developed fruit on a plant , which of the following statements is always true ?
( root ) cortex
Within a root , food is stored in the ?
anther
growing What part of a flower produces pollen ?