Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 46.3, Problem 1CSC
Although insects are major plant predators, carnivorous plants turn the tables on them, enticing insects with sugary secretions and bright colors. Scientists have round that the color red, such as found on the inner faces of the Venus flytrap leaf, enhances the attractiveness or certain carnivorous plants to insects. Sundews attract their insect prey using red hairs and an appealing scent.
Very few plants “eat” insects as Venus flytraps and sundews do. Do most plants instead stand stoically and allow themselves to be chewed on by insects or invaded by pathogens—or can they defend themselves?
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Which of the following are examples of how plants can either benefit or fool herbivores or
pollinators?
A flower produces nectar to attract bees.
A plant produces thorns to deter herbivores.
A flower mimics the appearance of a female insect to attract male pollinators.
A plant produces a fruit that contains seeds, which are then dispersed by the animal that eats the fruit.
A plant grows taller to reach more sunlight.
Unripe fruits are hard and tart. Ripening is a process that sweetens and softens the fruit to
make it more attractive to animals who will eat the fruit and disperse the seeds. A plant
hormone, ethylene, leads to the ripening of many fruits. Once ethylene starts being pro-
duced, it initiates a feedback loop that causes more ethylene to be produced, increasing
the rate of ripening.
Which of the following best identifies and describes the feedback loop initiated by the pro-
duction of ethylene?
A
It is a positive feedback loop because the initiating stimulus causes a subsequent de-
crease in the stimulus.
B
с
D
It is a negative feedback loop because the initiating stimulus causes a subsequent in-
crease in the stimulus.
It is a negative feedback loop because the initiating stimulus causes a subsequent de-
crease in the stimulus.
It is a positive feedback loop because the initiating stimulus causes a subsequent in-
crease in the stimulus.
This plant is referred to as
This plant is referred to as
: Venus flytrap
: butterwort
: sundew
: bladderwort
Chapter 46 Solutions
Biology
Ch. 46.1 - list six important types of plant hormones?Ch. 46.1 - Prob. 2CYLCh. 46.2 - Explain how the Darwin experiments using caps and...Ch. 46.2 - Prob. 1CTCh. 46.2 - Prob. 2TCCh. 46.2 - Prob. 3TCCh. 46.2 - Agricultural biotechnologists have developed...Ch. 46.2 - explain the roles of plant hormones in seed...Ch. 46.2 - Prob. 2CYLCh. 46.2 - Prob. 3CYL
Ch. 46.2 - Prob. 4CYLCh. 46.2 - Prob. 5CYLCh. 46.2 - Prob. 6CYLCh. 46.3 - Although insects are major plant predators,...Ch. 46.3 - Prob. 1HYEWCh. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - Prob. 3CYLCh. 46.3 - Prob. 4CYLCh. 46.3 - Prob. 1TCCh. 46 - Prob. 1MCCh. 46 - Prob. 2MCCh. 46 - Prob. 3MCCh. 46 - Prob. 4MCCh. 46 - Prob. 5MCCh. 46 - Prob. 1FIBCh. 46 - Prob. 2FIBCh. 46 - Prob. 3FIBCh. 46 - Prob. 4FIBCh. 46 - The hormone _________ causes stomata to close when...Ch. 46 - Compare phototropism and gravitropism in roots and...Ch. 46 - Prob. 2RQCh. 46 - What is a phytochrome? How do the two forms of...Ch. 46 - Which hormones cause fruit development? Which...Ch. 46 - What is senescence? Describe some changes that...Ch. 46 - Prob. 6RQCh. 46 - Describe one example of a plant chemical defense...Ch. 46 - Describe how a sensitive plant closes its leaves....Ch. 46 - A student reporting on a project said that one of...Ch. 46 - Prob. 2AC
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- Using a plant like peppermint can help farmers because... It can attract pests to it instead of the crops It can scare away pests It attracts natural predators of common plant pests It releases pheromones to attract pollinatorsarrow_forwardSome plants in wetter climates release certain chemicals in response to leaf consumption by insects. These chemicals may either repel the leaf-eaters and/or attract other insects that will consume the leaf-eaters. A researcher was interested in whether desert plants emitted the same types of compounds. Desert plants have different kinds of leaves compared to plants from less arid areas. The researcher harvested Coville’s lip fern (Cheilanthes covillei) from deserts in Utah to bring into a greenhouse. The plants were 12 – 15 cm (5 – 6 in) tall. Each plant was placed in a separate pot, and there were 40 pots in all. Each pot was assigned to one of four “leaf eater” treatments: a control (i.e., no insects); 5 hornworms; 5 leaf bugs; or 5 flea beetles. Then the researcher measured the emission rate of a particular repelling compound from each plant once every hour for a total of 8 hours (8:00 am – 4:00 pm). Based on this scenario, please answer the following questions: a) What is the…arrow_forwardWhat is the purpose of the fruit we (and other animals) eat, from the plant's perspective? Group of answer choices To create something attractive to pollinators. To create a food item that ensures humans will continue to farm them. To bring in more than one type of pollinator. To entice us to eat the seeds contained inside the fruit, and thus disperse the seeds.arrow_forward
- This plant is referred to as This plant is referred to as : bladderwort : Venus flytrap : Pitcher plant : sundew : butterwortarrow_forwardWhich of the following is most likely NOT an example of a plant defense to herbivory? Lignin in the tissues Urushiol production (e.g. in poison ivy) Coconut huskarrow_forwardi) list TWO adaptations that show that the plant conserves water.ii) Photosynthetic cells produce starch and may be stored. Describe how one may test for the presence of starch on a piece of potato tissue. iii) Give TWO characteristics of monocotyledonous plants. d. The transition of plants from an aquatic environment to a terrestrial one has broughtabout many evolutionary adaptations for plants to survive on land. Give ONE adaptationfor each of the following divisions:i) Mosses: ii) Gymnosperms.arrow_forward
- Which of the following hormones are NOT matched with the proper function? abscisic acid- promotes leaf abscission cytokinins-stimulates cell division ethylene- promotes fruit ripening gibberellic acid- promotes stem elongation auxin-promotes increases in cell sizearrow_forwardOpenings in the plant body to allow for gas exchange are termed palisade cells collenchyma stomata spiraclesarrow_forwardPlease answer question 2arrow_forward
- Match the effect/process with the hormone responsible or effected when plants encounter an object and slow their growth, thicken the organ (root or stem), and grow around the object this hormone is activated in response to attack by biotrophic pathogens stimulates germination loss of function of this hormone results in early germination before seeds are mature the hormone that is responsible for stimulating cell division…arrow_forwardWhich statement about wind-pollinated plants is correct? Their stamens and stigmas are inside the flower and, compared to insect-pollinated plants, they have large petals Their stamens and stigmas are outside the flower and, compared to insect-pollinated plants, they have small petals Their stamens and stigmas are outside the flower and, compared to insect-pollinated plants, they have large petalsarrow_forwardWhich hormone(s) is/are responsible for the ability of sunflowers to turn their flowers to track the sun throughout the day? Explain how these hormones work.arrow_forward
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