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Secondary phloem


A) includes live companion cells and dead sieve cells.
B) encompasses more stem volume than secondary xylem.
C) primarily stores carbohydrates.
D) is part of the inner bark.

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Which of these is not a possible function of trichomes?


A) reflect light from leaf surfaces
B) store or secrete salt
C) defend against insects
D) structural support

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Primary growth at the apical meristems can produce cells that differentiate into each of these cell types, except which?


A) leaves
B) ground tissue
C) procambium
D) cork cambium

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The name of the meristem that ultimately gives rise to secondary xylem and phloem is the


A) vascular cambium.
B) cork cambium.
C) intercalary meristems.
D) ground meristem.

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How could you distinguish between a root hair versus a very small root?


A) Root hairs are white, while roots are brown.
B) Root hairs are extensions of single cells, while roots are multicellular.
C) Root hairs only absorb water, not nutrients like roots.
D) Root hairs do not have a cuticle.

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Cell division in the apical meristems at the tips of a plant that results in increases in height or length is called


A) primary growth.
B) secondary growth.
C) vascular cambium growth.
D) mitotic growth.

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You propose an experiment where root hairs of a particular plant species are continuously treated with an antibiotic while nutrient levels in the plant tissue are monitored.Based on your knowledge of root hairs, you hypothesize the plant will experience a deficiency in what nutrient?


A) potassium
B) nitrogen
C) calcium
D) phosphorus

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Root hairs grow actively in which area of the developing roots?


A) root cap
B) zone of maturation
C) zone of elongation
D) zone of cell division

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Which of the following is not true about meristems?


A) They can be apical or lateral.
B) Meristematic cells divide into two cells, one of which remains a meristem cell and another that becomes a plant body cell.
C) Apical meristems give rise to three types of embryonic tissues.
D) Meristematic cells are found only in eudicots and not in monocots.

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The slender stalk that connects the flattened leaf blade to the stem in most dicots is the


A) meristem.
B) petiole.
C) stele.
D) receptacle.

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The most distinctive characteristic of leaf mesophyll cells is that they are filled with


A) central vacuoles.
B) many chloroplasts.
C) oxygen bubbles.
D) veins.

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You come across a recipe for rhubarb pie.Never having heard of rhubarb, you do a little research.You find out that the part of a rhubarb plant that people eat is the petiole of a large leaf.You purchase some rhubarb for your pie and notice that it contains many long stringy fibers.Based on your knowledge of plant tissues, you know that the stringy fibers are


A) parenchyma tissue.
B) phloem tissue.
C) sclerenchyma tissue.
D) collenchyma tissue.

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In an experiment, some herbaceous, nonwoody plants were exposed to frequent windy conditions or mechanical shaking for several hours per day.The flexibility of these plants was due to the _____________ cells.


A) parenchyma
B) aerenchyma
C) periderm
D) collenchyma

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If you examined a cross section of a woody stem under the microscope and located the vascular cambium, the tissues on the inside of the vascular cambium ring (towards the center of the stem) would be


A) xylem (primary and secondary) .
B) xylem (only primary) .
C) phloem (primary and secondary) .
D) phloem (only secondary) .

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Which statement concerning root hairs is not correct?


A) Root hairs are tubular extensions of individual epidermal cells.
B) A root hair is isolated from its epidermal cell with a cross wall.
C) Root hairs generally live only a few days before being sloughed off.
D) Root hairs increase the absorption of water and minerals.

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Which of these is not a function of the root cap?


A) gravity perception
B) rapid cell division
C) protection of the root tip
D) pushing away soil particles as the root grows

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Compound leaves


A) have two or more petioles per blade.
B) have a blade divided into leaflets.
C) are toothed at the edges.
D) are alternately arranged.

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Which statement about secondary growth in plants is not correct?


A) Secondary growth in plants is a result of lateral meristems.Trees and shrubs have active lateral meristems.
B) Secondary growth in plants increases the girth (diameter) of woody plants.
C) Secondary growth in woody plants results from two cylinders of actively dividing cells, the cork cambium and vascular cambium.
D) The cork cambium produces secondary phloem while the vascular cambium produces secondary xylem.

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A birdhouse is nailed into a tree 6 feet up from the ground.If the tree grows about 2 feet taller each year, where will the birdhouse be 25 years later?


A) 50 feet
B) 56 feet
C) 26 feet
D) 6 feet

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An increase in plant diameter results from cell division in which type of meristem?


A) intercalary meristem
B) lateral meristem
C) primary meristem
D) secondary meristem

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