CAMPBELL BIOLOGY - BIO 121 W/ACC >IC<
CAMPBELL BIOLOGY - BIO 121 W/ACC >IC<
8th Edition
ISBN: 9781323423967
Author: Reece
Publisher: PEARSON C
bartleby

Concept explainers

Question
Book Icon
Chapter 17, Problem 14TYK
Summary Introduction

To hypothesize:

The reason why the genetic effects of radiation are faster to observe in a moss than in the other plants. Also, to design an experiment to hypothesize that the effect of mutation decreases as the organism’s distance from the source of radiation increases.

Concept introduction:

Mosses are a spore producing non vascular plants. The haploid gametophyte stage is the dominant phase in the mosses. The cells produced in moss have half the number of chromosomes as the parent plant. Whereas, the diploid sporophyte stage is dominant in most of the plants in which the offsprings have a double set of chromosomes.

Mutations are the changes occurred in the sequence of the genome of an organism. Mutations can cause genetic or phenotypic changes in an organism.

Blurred answer
Students have asked these similar questions
Many fungi are decomposers and degrade organic matter (such as wood and leaf litter). It has become clear that many of these decomposers are also able to colonize live plants as endophytes (living inside the plant without causing any harm) and allowing for prime access to plant tissues once the plant dies. Explain, using the principles of natural selection, how having the ability to be both a decomposer and endophyte evolved. Make sure you include the four steps of evolution by natural selection in your response.
An important goal of molecular botanists is to insert the genes for nitrogen fixation into crop plants such as corn or wheat. Why would the insertion of such genes be useful? What changes in farming practices would this technique allow?
The fungus Botrytis cinerea is a pathogen of plants, and causes high losses of strawberry crops around the world.  In Europe, most B. cinerea fungi are killed by fungicides (chemicals sprayed on the crops to kill the fungus).  However, some B. cinerea are resistant, and continue to live even when exposed to fungicides.  If the currently-used fungicides continue to be sprayed on strawberry crops in Europe, what is expected to happen? (Choose one.)   a)The strawberries will eventually become larger and more resistant to fungicides.   b)The strawberries will form a beneficial association (mutualism) with the B. cinerea, and both will be resistant to the fungicides.   c)Strawberry plants will preferentially be colonized by B. cinerea that are not resistant to fungicides.   d) The proportion of B. cinerea that are resistant to fungicides will increase in the population over time, and these fungicides will no longer be effective at killing most of these fungi.
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning