Discuss the unique reproductive capacity of the bdelloid rotifer. What will be an ideal response?
ANSWER: A newly discovered ability may help to explain the success of the bdelloids despite their
rejection of sex. These rotifers can apparently import genes from bacteria, fungi, protists, and
even plants. If the main advantage of sex is that it promotes genetic diversity, why worry
about it when you have the genes of entire kingdoms available to you?
The direct swapping of genetic material is incredibly rare in animals, but bdelloids are
bringing in external genes to an extent completely unheard of in complex organisms. Each
rotifer is a genetic mosaic whose DNA spans almost all the major kingdoms of life: About 10
percent of its active genes have been pilfered from other organisms.
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The above figure is of one of the most
poisonous mushrooms. Which of the following is true? a. It is a club fungus. b. It is called death cap. c. It is often mistaken for a puffball. d. It kills by causing liver and kidney failure. e. All of these are true
Which cells make up the ground tissue that provides rigid support via the thick, typically lignified, cell walls that remain after the cells die?
a. vessel members cells b. sclerenchyma cells c. tracheids cells d. collenchyma cells
Sea stars are genetically different from each other and from their parents. These genetic differences are the result of
A) asexual reproduction. B) sexual reproduction. C) cloning. D) mitosis.
Septicaemia refers to spread of bacterial toxins in blood while toxaemia refers to clinical blood infection by large and multiplying pathogenic microbes
a. true b. false