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This activity contains 58 questions.

Question 1
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Which of the following would be the least useful in figuring out whether a plant is a monocot or a dicot?
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Question 2
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Which of the following is a characteristic of dicots?
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Question 3
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Monocot stems differ from dicot stems in that _____.
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Question 4
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In the hierarchical organization of plants, the leaf is a(n) _____.
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Question 5
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In the hierarchy of biological organization, the shoot is a(n) _____.
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Question 6
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A root hair is a(n) _____.
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Question 7
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Leaves occur at intervals along the plant stem. The region where a leaf is attached to the stem is the _____.
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Question 8
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Most leaves consist of _____.
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Question 9
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The shoot system of a beavertail cactus consists of broad paddlelike structures covered with spines. The spines are modified _____, so the flat green paddles must be modified _____.
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Question 10
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_____ is an example of an edible petiole.
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Question 11
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The plant tissue system most analogous to our circulatory system is the _____.
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Question 12
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Guard cells _____.
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Question 13
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In most leaves, chloroplast-containing cells are most closely compacted in the _____.
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Question 14
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Ground tissue is composed of undifferentiated cells with thin walls that are usually involved with storage. At the stage in a dicot plant's life when only primary growth has occurred, the inner portion of the ground tissue of a stem is called _____ and the outer portion is called _____.
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Question 15
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A cross section of part of a plant exposes epidermis, a thick cortex, and a central cylinder of xylem and phloem. This part is a _____.
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Question 16
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Arrange the structures found in a typical leaf blade from inside to outside.
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Question 17
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Most of the photosynthesis in a plant is carried out by _____ in the leaves.
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Question 18
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Collenchyma cells can be recognized by _____.
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Question 19
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Monocots never have wood, but they may gain structural support from abundant _____.
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Question 20
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Artichoke hearts are tender and tasty. The leaves are tasty too, but most of an artichoke leaf is fibrous and impossible to chew. The leaves must contain lots of _____.
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Question 21
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Both tracheids and fibers _____.
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Question 22
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Which of the following are dead at maturity?
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Question 23
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Which vascular cells in plants must die before they become functional?
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Question 24
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A root is forced down through the soil by _____.
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Question 25
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The primary growth of a plant adds _____ while secondary growth adds _____.
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Question 26
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A region of cell division in a plant is called a _____.
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Question 27
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The site of primary growth, growth that increases the length of a plant, occurs at _____.
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Question 28
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The protective layer that covers the apical meristem of a root and may aid in orientation is called the _____.
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Question 29
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Plants grow by primary and secondary mechanisms. Choose the correct description of a mechanism and its result.
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Question 30
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Cell division in the vascular cambium adds to the girth of a tree by adding new _____ on the inside of the cambium layer and _____ on the outside.
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Question 31
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If you pound a nail into a tree 3 feet off the ground and come back to find it in 20 years, it will be _____.
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Question 32
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Cell division would be slowest in which of these tissues?
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Question 33
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Secondary phloem in the root develops from the _____.
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Question 34
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Which of the following is closest to the center of a woody stem?
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Question 35
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A vandal killed a historic oak tree on the village green by girdling it with a chain saw. He cut through the bark and into the sapwood all the way around the tree. Why did the tree die?
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Question 36
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In a large, old tree, which of the following provides the most physical support?
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Question 37
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Annual rings in wood reflect the fact that in climates with a single growing season every year, the _____ divides actively when water is plentiful and temperatures are suitable for growth, and ceases to divide when water is scarce and the weather is cold.
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Question 38
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In what order would you pass through tissues when moving from the pith to the epidermis in a plant possessing secondary vascular tissue?
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Question 39
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The chemical that strengthens wood cell walls is _____.
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Question 40
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The female structures of angiosperms are called _____, and they produce _____.
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Question 41
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Select the correct association.
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Question 42
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The floral parts that take an active part in reproduction are _____.
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Question 43
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Pollen is _____ and produces _____.
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Question 44
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All gametophytes are _____.
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Question 45
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In the process of pollination, pollen grains are transferred from the _____ to the _____.
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Question 46
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Usually, the number of chromosomes in a flower's egg nucleus is _____ the number of chromosomes in a flower's pollen nucleus.
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Question 47
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If a leaf cell in a potato plant contains 48 chromosomes, a sperm cell in a pollen grain would usually contain _____ chromosomes.
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Question 48
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The male structures of angiosperms are called _____, and they produce _____.
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Question 49
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All of the following are true about angiosperm spores except _____.
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Question 50
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In angiosperms, double fertilization produces _____.
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Question 51
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After fertilization, the _____ develops into a seed and the _____ develops into a fruit.
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Question 52
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A seed is a mature _____.
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Question 53
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What is endosperm?
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Question 54
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In angiosperms, the seed coat develops from the _____.
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Question 55
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Flowers bear seeds in protective chambers called _____.
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Question 56
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Why do seeds need water to germinate?
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Question 57
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Plants growing in harsh environments such as deserts, sand dunes, and arctic tundra often reproduce vegetatively. This is because _____.
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Question 58
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Many plants have very long life spans because they have retained _____.
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