Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 43, Problem 31CTQ
Why is sexual reproduction useful if only half the animals can produce offspring and two separate cells must be combined to form a third?
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Ch.23
How is Salmonella able to cross from the intestines into the blood?
A. it is so small that it can squeeze between intestinal cells
B. it secretes a toxin that induces its uptake into intestinal epithelial cells
C. it secretes enzymes that create perforations in the intestine
D. it can get into the blood only if the bacteria are deposited directly there, that is, through a puncture
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Which virus is associated with liver cancer?
A. hepatitis A
B. hepatitis B
C. hepatitis C
D. both hepatitis B and C
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explain your answer thoroughly
Ch.21
What causes patients infected with the yellow fever virus to turn yellow (jaundice)?
A. low blood pressure and anemia
B. excess leukocytes
C. alteration of skin pigments
D. liver damage in final stage of disease
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What is the advantage for malarial parasites to grow and replicate in red blood cells?
A. able to spread quickly
B. able to avoid immune detection
C. low oxygen environment for growth
D. cooler area of the body for growth
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Which microbe does not live part of its lifecycle outside humans?
A. Toxoplasma gondii
B. Cytomegalovirus
C. Francisella tularensis
D. Plasmodium falciparum
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explain your answer thoroughly
Ch.22
Streptococcus pneumoniae has a capsule to protect it from killing by alveolar macrophages, which kill bacteria by…
A. cytokines
B. antibodies
C. complement
D. phagocytosis
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What fact about the influenza virus allows the dramatic antigenic shift that generates novel strains?
A. very large size
B. enveloped
C. segmented genome
D. over 100 genes
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explain your answer thoroughly
Chapter 43 Solutions
Biology 2e
Ch. 43 - Figure 43.8 Which of the following statements...Ch. 43 - Figure 43.15 Which of the following statements...Ch. 43 - Figure 43.17 Which of the following statements...Ch. 43 - Which form of reproduction is thought to be best...Ch. 43 - Which form of reproduction can result from damage...Ch. 43 - Which form of reproduction is useful to an animal...Ch. 43 - Genetically unique individuals are produced...Ch. 43 - External fertilization occurs in which type of...Ch. 43 - Which term applies to egg development within the...Ch. 43 - Which term applies to egg development outside the...
Ch. 43 - Sperm are produced in the______ scrotum seminal...Ch. 43 - Most of the bulk of semen is made by the...Ch. 43 - Which of the following cells in spermatogenesis is...Ch. 43 - Which female organ has the same embryonic origin...Ch. 43 - Which female organ has an endometrial lining that...Ch. 43 - How many eggs are produced as a result of one...Ch. 43 - Which hormone causes Leydig cells to make...Ch. 43 - Which hormone causes FSH and LH to be released?...Ch. 43 - Which hormone signals ovulation? FSH LH inhibin...Ch. 43 - Which hormone causes the regrowth of the...Ch. 43 - Nutrient and waste requirements for the developing...Ch. 43 - Progesterone is made during the third trimester by...Ch. 43 - Which contraceptive method is 100 percent...Ch. 43 - Which type of short term contraceptive method is...Ch. 43 - Which hormone is primarily responsible for The...Ch. 43 - Major organs begin to develop during which part of...Ch. 43 - Which of the following is false? The endoderm,...Ch. 43 - During cleavage, the mass of cells: increases...Ch. 43 - Which of the following gives rise to the skin...Ch. 43 - The ribs form from the ___________ . notochord...Ch. 43 - Why is sexual reproduction useful if only half the...Ch. 43 - What determines which sex will result in offspring...Ch. 43 - What are the advantages and disadvantages of...Ch. 43 - Why would paired external fertilization be...Ch. 43 - Describe the phases of the human sexual response.Ch. 43 - Compare spermatogenesis and oogenesis as to timing...Ch. 43 - If male reproductive pathways are not cyclical,...Ch. 43 - Describe the events in the ovarian cycle leading...Ch. 43 - Describe the major developments during each...Ch. 43 - Describe the stages of labor.Ch. 43 - What do you think would happen if multiple sperm...Ch. 43 - Why do mammalian eggs have a small concentration...Ch. 43 - Explain how the different germ layers give rise to...Ch. 43 - Explain the role of axis formation in development.
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