EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
7th Edition
ISBN: 8220102796409
Author: SALADIN
Publisher: YUZU
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Chapter 27.1, Problem 3AYLO
Summary Introduction
To discuss:
The organs which are considered as primary and secondary sex organs; internal and external genitalia; how secondary sex characteristics differ from secondary sex organs.
Introduction:
The organ system which produces the gametes are said to be a reproductive organ system. Depends on the role and function exerted by the reproductive organs during reproduction it is classified as primary and secondary sex organs. Genital organs are the one which involved sexual activity in order to facilitate the reproduction.
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Use the following information to answer the question(s) below.
Martin Wikelski and L. Michael Romero (Body size, performance and fitness in Galápagos marine iguanas, Integrative and
Comparative Biology 43 [2003]:376-86) measured the snout-to-vent (anus) length of Galápagos marine iguanas and observed
the percent survival of different-sized animals, all of the same age. The graph shows the log snout-vent length (SVL, a
measure of overall body size) plotted against the percent survival of these different size classes for males and females.
Survival (%)
100-
80-
60-
40-
20-
0+
1.9
T
2 2.1
2.2 2.3 2.4 2.5 2.6 2.7
Log SVL (mm)
19) Examine the figure above. What type of selection for body size appears to be occurring in these marine iguanas?
A) directional selection
B) stabilizing selection
C) disruptive selection
D) You cannot determine the type of selection from the above information.
3
24) Use the following information to answer the question below.
Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not.
They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes
the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin.
Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are
determined (see table) and used to determine the actual allele frequencies in the population.
TT
0.49
Tt
0.42
tt
0.09
Refer to the table above. Is this population in Hardy-Weinberg equilibrium?
A) Yes.
C) No; there are more homozygotes than expected.
B) No; there are more heterozygotes than expected.
D) It is impossible to tell.
30)
A
B
CDEFG
Refer to the accompanying figure. Which of the following forms a monophyletic group?
A) A, B, C, and D
B) C and D
C) D, E, and F
D) E, F, and G
Chapter 27 Solutions
EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
Ch. 27.1 - Prob. 1BYGOCh. 27.1 - Prob. 2BYGOCh. 27.1 - Prob. 3BYGOCh. 27.1 - Prob. 4BYGOCh. 27.1 - Prob. 5BYGOCh. 27.1 - Prob. 1AYLOCh. 27.1 - Prob. 2AYLOCh. 27.1 - Prob. 3AYLOCh. 27.1 - Prob. 4AYLOCh. 27.1 - Prob. 5AYLO
Ch. 27.1 - Prob. 6AYLOCh. 27.1 - Prob. 7AYLOCh. 27.1 - Prob. 8AYLOCh. 27.2 - Prob. 6BYGOCh. 27.2 - Prob. 7BYGOCh. 27.2 - Prob. 8BYGOCh. 27.2 - Prob. 9BYGOCh. 27.2 - Prob. 10BYGOCh. 27.2 - Prob. 1AYLOCh. 27.2 - Prob. 2AYLOCh. 27.2 - Prob. 3AYLOCh. 27.2 - Prob. 4AYLOCh. 27.2 - Prob. 5AYLOCh. 27.2 - Prob. 6AYLOCh. 27.2 - Prob. 7AYLOCh. 27.2 - Prob. 8AYLOCh. 27.2 - Prob. 9AYLOCh. 27.3 - Prob. 11BYGOCh. 27.3 - Prob. 12BYGOCh. 27.3 - Prob. 13BYGOCh. 27.3 - Prob. 14BYGOCh. 27.3 - Prob. 15BYGOCh. 27.3 - Prob. 1AYLOCh. 27.3 - Prob. 2AYLOCh. 27.3 - Prob. 3AYLOCh. 27.3 - Prob. 4AYLOCh. 27.3 - Prob. 5AYLOCh. 27.3 - Prob. 6AYLOCh. 27.4 - Prob. 16BYGOCh. 27.4 - Prob. 17BYGOCh. 27.4 - Prob. 18BYGOCh. 27.4 - Prob. 1AYLOCh. 27.4 - Prob. 2AYLOCh. 27.4 - Prob. 3AYLOCh. 27.4 - Prob. 4AYLOCh. 27.4 - Prob. 5AYLOCh. 27.4 - Prob. 6AYLOCh. 27.4 - Prob. 7AYLOCh. 27.4 - Prob. 8AYLOCh. 27.4 - Prob. 9AYLOCh. 27.4 - Prob. 10AYLOCh. 27.4 - Prob. 11AYLOCh. 27.5 - Prob. 19BYGOCh. 27.5 - Prob. 20BYGOCh. 27.5 - Prob. 1AYLOCh. 27.5 - Prob. 2AYLOCh. 27.5 - Prob. 3AYLOCh. 27.5 - Prob. 4AYLOCh. 27.5 - Prob. 5AYLOCh. 27.5 - Prob. 6AYLOCh. 27.5 - Prob. 7AYLOCh. 27 - The ductus deferens develops from the _______.of...Ch. 27 - The protein that clots and causes the stickiness...Ch. 27 - The expulsion of semen occurs when the...Ch. 27 - Prob. 4TYRCh. 27 - The penis is attached to the pubic arch by crura...Ch. 27 - The first hormone secreted at the onset of puberty...Ch. 27 - Prob. 7TYRCh. 27 - Four spermatozoa arise from each a. primordial...Ch. 27 - The point in meiosis at which sister chromatids...Ch. 27 - Blood is forced out of the penile lacunae by...Ch. 27 - Prob. 11TYRCh. 27 - Prob. 12TYRCh. 27 - Prob. 13TYRCh. 27 - Prob. 14TYRCh. 27 - Prob. 15TYRCh. 27 - Prob. 16TYRCh. 27 - Prob. 17TYRCh. 27 - Prob. 18TYRCh. 27 - Erection of the penis occurs when nitric oxide...Ch. 27 - A sperm penetrates the egg by means of enzymes in...Ch. 27 - crypto-Ch. 27 - Prob. 2BYMVCh. 27 - Prob. 3BYMVCh. 27 - Prob. 4BYMVCh. 27 - Prob. 5BYMVCh. 27 - meio-Ch. 27 - Prob. 7BYMVCh. 27 - Prob. 8BYMVCh. 27 - someCh. 27 - Prob. 10BYMVCh. 27 - Prob. 1TFCh. 27 - Prob. 2TFCh. 27 - Prob. 3TFCh. 27 - Prob. 4TFCh. 27 - A high testosterone level makes a fetus develop a...Ch. 27 - Prob. 6TFCh. 27 - Prob. 7TFCh. 27 - Prob. 8TFCh. 27 - Male menopause is the cessation of sperm...Ch. 27 - ? True or False
10. Erection is caused by...Ch. 27 - Prob. 1TYCCh. 27 - Prob. 2TYCCh. 27 - Prob. 3TYCCh. 27 - Why is it possible for spermatogonia to be outside...Ch. 27 - A 68-year-old man taking medication for...
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