Biology: Concepts and Investigations
Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 23.3, Problem 3MC
Summary Introduction

To determine:

The difference between a source and a sink, and also to determine if same plant part can act as both a source and a sink

Concept introduction:

In plants, there is a considerable movement of various substances from region of supply to the region of utilization and storage. Sink source relationship is a process involved in translocation of photosynthetic products in plants.

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As scientists research and develop biofuels, they are faced with many tradeoffs. A plant's usefulness for biofuels depends on how much energy can be collected from the plant matter. In addition, growing plants on a large scale requires energy—such as the gasoline and power needed to run tractors and other harvesting equipment or the energy needed to create and distribute fertilizers and pesticides. An efficient biofuel would maximize the ratio of energy output to energy input.   The following graph illustrates the results of a 10-year study analyzing three different crops used in biofuel production. The data show how much energy was required to grow each crop on 1 hectare of land (energy input) and how much energy was recovered from the total crop on each hectare of land (energy output). A hectare is a measurement of an area of land and is roughly the same as 2.5 acres.   What was the estimated energy input of the grass? A. kcal x 10^6 B. 2kcal x 10^6 C. 8kcal x 10^6
As scientists research and develop biofuels, they are faced with many tradeoffs. A plant's usefulness for biofuels depends on how much energy can be collected from the plant matter. In addition, growing plants on a large scale requires energy—such as the gasoline and power needed to run tractors and other harvesting equipment or the energy needed to create and distribute fertilizers and pesticides. An efficient biofuel would maximize the ratio of energy output to energy input.     The following graph illustrates the results of a 10-year study analyzing three different crops used in biofuel production. The data show how much energy was required to grow each crop on 1 hectare of land (energy input) and how much energy was recovered from the total crop on each hectare of land (energy output). A hectare is a measurement of an area of land and is roughly the same as 2.5 acres.   What was the estimated energy input of the grass?   A. 2 kcal × 106   B. 4 kcal × 106   C. 8 kcal…
What are the boilogical advantages and disadvantages of using hydroponics to grow food? or.. Thanks
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