CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 25, Problem 5TYU
Summary Introduction

Introduction:

When one creature lives in the body of other organism and has mutual beneficial relation, then this interaction is known as endosymbiosis. In secondary endosymbiosis, the plastid lives in the prokaryotes and in primary endosymbiosis; the plastids are present in eukaryotes.

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Which of the following structures in chlorarachniophytes provides evidence that they evolved through the endosymbiosis of a green alga by a heterotrophic eukaryote? A. food vacuole B. nucleomorph C. mitosomes D. flagella
Which of the following statements is the MOST compelling argument that fungi are more closely related to animals than plants?   A. Plants have chloroplasts whereas fungi and animals cells do not.   B. Plants fix carbon dioxide from the air; fungi and animals use pre-existing organic molecules.   C. The DNA sequences of ribosomal RNA of fungi share more homology with ribosomal RNA from animals than plants.   D. Both animal and fungal cells are eukaryotic.
Horizontal gene transfer probably started soon after endosymbiosis. It has resulted in genes being moved from the mitochondrion to the nucleus.      What is a reasonable explanation for why some genes still remain in the mitochondria?    A.  The products of those genes are rapidly damaged and need to be quickly replaced.   B.  The products of those genes are not required for organelle function.   C.  The ability for lateral gene transfer ended about a billion years ago and some genes simply got “stuck” within mitochondria.   D.  The products of those genes are only needed in the mitochondria.
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