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 ?