Which plant part is a young sporophyte that lies dorman in the seed and is protected by the seed coat?
Which of the following correctly compares extracellular matrix of animal cells to walls of plant cells?
Both the ECM and plant cell wall are composed of varying mixtures of proteins and carbohydrates.
Which of the following is incorrectly paired with its structure and function?
Pericyle - waterproof ring of cells surrounding the central stele in roots
Which of the following best distinguishes between annuals, biennials, and perennials?
the time from seed germination to seed production
What effect does "pinching back" have on a houseplant?
produces a plant that will grow fuller
What is the difference between the root epidermis and the shoot epidermis?
On the shoot epidermis produces a waxy cuticle
Which of the following is the correct sequence from the growing tops of the root upward?
I,V, III, II, IV
Which would be least useful in figuring out whether a plant is a monocot or a dicot?
size at maturity
You are studying a plant from the arid southwestern U.S. Which of the following adaptations is least likely to have evolved in response to water shortages?
Development of large leaf surfaces to absorb water
Suppose George Washington completely removed the bark from around the base of a cherry tree but was stopped by his father before cutting the tree down. The leaves retained their normal appearance for several weeks, but the tree eventually died. The tissue that George left function was the
The production of root hairs is mostly dependent on which of the following influences?
Position of an epidermal cell
The protective layer that covers the apical meristem of a root and may aid in orientation is called the
The definition of simple primary tissues is that they are composed of which of the following?
one or two simple cell types
The protoderm of the apical meristem generates what cell types?
trichomes, guard cells, and epidermal cells
The driving force that pushes the root tip through the soil is due primarily to
elongation of cells behind root apical meristem
A student examining leaf cross sections under a microscope find many loosely packed cells with relatively thin cells. The cells have numerous chloroplasts. What type of cells are these?
Arrange the structures found in a typical leaf blade from inside to outside.
Vascular bundle, mesophyll, epidermis
Artichoke hearts are tender and tasty, the leaves are too, but most of an artichoke leaf is fibrous and impossible to chew. The leaves must contain lots of
According to the ABC model of floral development, a showy ornamental flower with multiple sepals and petals but no stamens or carpels would express
A and B genes only
A cross section of part of a plant exposes epidermix, a thick cortex, and a central cylinder of xylem and phloem. This part is the
A short branch was cut into three segments as shown in figure to some cuttings. Roots will form at which positions?
A, C, and E
Plants grow by primary and secondary mechanisms. Choose the correct description of a mechanism and its result.
Primary and secondary growth are required to produce woody plants.
Plant embryos grow into seedinglys by adding new cells at only 2 growth points which are called
shoot and root apical meristems
Procambium ultimately gives rise to
primary and secondary xylem and primary and secondary phloem shoot and root apical meristems
If you were able to walk into an opening cut into the center of a large redwood tree, when you exit from the middle of the trunk (stem) outwards, you would cross, in order
the annual rings, phloem, and bark
If a cross section of a eudicot herbaceous stem were compared with the cross sectino of its root the primary difference would be
location of vascular tissue
Bark becomes scarly because
cork cambium divides only parallel to the surface, and thus does not increase in circumference
Before differentiation can begin during the processes of plant cell and tissue culture, paraenchyma cells from that source tissue must
Experiments involving the peptide known as CLAVATA3 were carried out to determine which of the following?
The influence of CLAVATA3 on peripheral zone cell development
Monocot stems differ from dicot stems in that
In cross section the vascular bundles of monocots have a complex arrangement, whereas in dicots the vascular bundles are arranged in a circle
Leaves occur at intervals along the plant stem. The region where a leaf is attached to the stem is the
one important difference between the anatomy of roots and the anatomy of leaves is that
a waxy cuticle cover leaves but is absent in roots
All of the following cell types are correctly matched with their functions except
companion cell--formation of secondary xylem and phloem
The mesophyll of the leaf has which of the following characteristics?
It is made up of palisade and spongy parenchyma cells