PRINT UPGRADE-MARINE BIOLOGY
PRINT UPGRADE-MARINE BIOLOGY
11th Edition
ISBN: 9781264117093
Author: CASTRO
Publisher: MCG
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Chapter 7, Problem 3CT
Summary Introduction

To explain: The reason why the sea daisies or concentricycloids were classified as echinoderms, and not as the members of a new phylum.

Introduction: Animal phylogeny is the rapidly changing field for the biologists. Even the members of animal kingdom are incredibly diverse, there are various animals sharing certain features that resemble them from other organisms of the kingdom.

Summary Introduction

To propose: A hypothesis is how sea daisies feed or move around.

Introduction: Animal phylogeny is the rapidly changing field for the biologists. Even the members of animal kingdom are incredibly diverse, there are various animals sharing certain features that resemble them from other organisms of the kingdom. Sea daisies are small, circular animals and are related to sea star. They belong to the phylum echinoderms.

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Alleles at the P locus control seed color. Plants which are pp have white seeds, white flowers and no pigment in vegetative parts. Plants which are P_ have black seeds, purple flowers and may have varying degrees of pigment on stems and leaves. Seed color can be assessed, visually, based on if the seed is white or not white A gene for mold resistance has been reported and we want to determine its inheritance and whether it is linked to P. For the purposes of this exercise, we will assume that resistance is controlled by a single locus M, and M_ plants are resistant and mm plants are susceptible.  Resistance can be measured, under greenhouse conditions, 2 weeks after planting, by injecting each seedling with a spore suspension. After two weeks, the seedlings can be rated as resistant or susceptible, based on whether or not tissue is actively sporulating. For this exercise we will use seed and data from the F10 generation of a recombinant inbred population produced using single seed…
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