25 Which of the following lets us check if seeds need soil to germinate or not? Seeds put in a piate with dry cotton Seeds put in a pot with wet soil Seeds put in a plate with wet cotfon and as well as a plate with wet soil Seeds put in a pot with wet soil as well as a pot with dry soil D. ASSET 37K

25 Which of the following lets us check if seeds need soil to germinate or not? Seeds put in a piate with dry cotton Seeds put in a pot with wet soil Seeds put in a plate with wet cotfon and as well as a plate with wet soil Seeds put in a pot with wet soil as well as a pot with dry soil D. ASSET 37K

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter28: Plant Nutrition And Transport

Section: Chapter Questions

Problem 6SQ

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Concept explainers

Plant sensory system

The plant sensory system is a sophisticated system that responds to environmental stimuli such as light,temperature, gravity, and touch. Research predicts that plant hormones and signaling mechanisms areresponsible for this regulation system in plants.

Question

100%

Which of the following lets us check if seeds need soil to germinate or not?
Seeds put in a plate
with dry cotton
Seeds put in a pot
with wet soil
Seeds put in a plate with
wet cotlon and as well as
a plate with wet soi
Seeds put in a pot with
wet soil as well as
a pot with dry soil
D.
ASSET 37K
Ai SHOT ON OPPO

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TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 1. How many transgenic plants did the researchers test?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 2. In which group did the researchers see the slowest rate of TCE uptake? The fastest?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 3. On day 6, what was the difference between the TCE content of air around planted transgenic plants and that around vector control plants?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Individual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethylene) around 15,000 micrograms per cubic meter of air. Samples of the air in the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 4. Assuming no other experiments were done, what two explanations are there for the results of this experiment? What other control might the researchers have used?