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Quizzes

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Exam:
6624 quizzes
A raisin soaked in water swells to twice its size and shrinks again when it is dried. A young leaf doubles its area over a week and keeps its new size. Which of the two shows growth, and why? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
Just above the dividing zone of a root, the cells become longer, their vacuoles grow larger and a new wall is added. Which phase of growth is this? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
The growth of a plant is called open. What is the reason? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
A root lengthens by the same amount every day for ten days. What does the graph of its length against time look like? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
A sunflower seedling is 20 cm tall on Monday. It is 26 cm tall on Thursday. What is the absolute growth rate of its height? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
Which row gives the order of the three phases of growth in a shoot, starting at the apex and moving away from it? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
Which of these structures of a dicot stem arises when living cells that had stopped dividing begin to divide again? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
The leaves of a young larkspur plant differ in shape from the leaves of the same plant when it is mature. This is an example of New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
Seedling X weighs 10 g and gains 5 g in a week. Seedling Y weighs 50 g and also gains 5 g in the same week. Which statement is correct? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Hard
A culture of plant cells has stopped increasing in weight, although its cells are alive and the medium is almost used up. Which phase is it in, and what is the likely reason? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Hard
Rice seedlings in a nursery grow very tall, thin and pale, and then fall over. The cause is a fungus that releases a chemical into the plant. Which chemical is it? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
In an oat seedling, where is auxin made in the greatest amount? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
A gardener buys a rooting powder and a lawn weed killer. Both contain synthetic auxins. Which pair of names could be on the two labels? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
A trader keeps green bananas in a closed room and adds a gas to hasten ripening. Which plant growth regulator is the gas? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
Skoog and his co-workers found that tobacco tissue divided only when a substance from a certain source was added. What was the source of the substance, later named kinetin? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
A gardener cuts off the top of a young hedge shoot, and the hedge becomes bushy. Which statement explains this best? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
A plant growth regulator is made from carotenoids. It closes stomata when water is short, and it helps seeds to survive drying. Which one is it? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
Which of these pairs correctly joins a plant growth regulator to the kind of molecule it is? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
A student lays a block of agar that held auxin on the right half of a decapitated oat coleoptile in the dark. A second coleoptile gets a plain agar block in the same place. What does she see? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Hard
A cabbage plant stays as a low rosette of leaves for a long time. A spray of a plant growth regulator makes the stem shoot up and bear flowers. Which statement is correct? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Hard
Seeds of a legume lie for weeks in moist, warm soil and do not sprout. A gardener nicks the coat of a few with a knife, and they sprout in three days. What is the most likely cause of their dormancy? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
Which of these treatments is called stratification? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
A seed is cut open and the hormones in it are measured. It holds a large amount of abscisic acid and very little gibberellin. What is the state of this seed, and what would help to wake it? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
A short-day plant has a critical dark period of 12 h. No flash falls in the night. In which day will it flower? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Medium
Which part of a plant perceives the length of day and night? New
High School (11–12) · Plant Growth and Development
A-Level, IB
StemPy LabStemPy Lab
Easy
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